derived_cond_pushdown.result

create table t1 (a int, b int, c int);
create table t2 (a int, b int, c int, d decimal);
insert into t1 values 
(1,21,345), (1,33,7), (8,33,114), (1,21,500), (1,19,107), (5,14,787),
(8,33,123), (9,10,211), (5,16,207), (1,33,988), (5,27,132), (1,21,104),
(6,20,309), (6,20,315), (1,21,101), (8,33,404), (9,10,800), (1,21,123),
(7,11,708), (6,20,214);
insert into t2 values
(2,3,207,207.0000), (1,21,909,12.0000), (7,13,312,406.0000), 
(8,64,248,107.0000), (6,20,315,279.3333), (1,19,203,107.0000),
(8,80,800,314.0000), (3,12,231,190.0000), (6,23,303,909.0000);
Warnings:
Note	1265	Data truncated for column 'd' at row 5
create table t1_double(a int, b double, c double);
insert into t1_double values 
(1,23.4,14.3333), (1,12.5,18.9), (3,12.5,18.9),
(4,33.4,14.3333), (4,14.3333,13.65), (5,17.89,7.22),
(6,33.4,14.3), (10,33.4,13.65), (11,33.4,13.65);
create table t2_double(a int, b double, c double);
insert into t2_double values 
(1,22.4,14.3333), (1,12.5,18.9), (2,22.4,18.9),
(4,33.4,14.3333), (5,22.4,13.65), (7,17.89,18.9),
(6,33.4,14.3333), (10,31.4,13.65), (12,33.4,13.65);
create table t1_char(a char, b char(8), c int);
insert into t1_char values
('a','Ivan',1), ('b','Vika',2), ('b','Inga',6), ('c','Vika',7),
('b','Ivan',7), ('a','Alex',6), ('b','Inga',5), ('d','Ron',9),
('d','Harry',2), ('d','Hermione',3), ('c','Ivan',3), ('c','Harry',4);
create table t2_char(a char, b char(8), c int);
insert into t2_char values
('b','Ivan',1), ('c','Vinny',3), ('c','Inga',9), ('a','Vika',1),
('c','Ivan',2), ('b','Ali',6), ('c','Inga',2), ('a','Ron',9),
('d','Harry',1), ('b','Hermes',3), ('b','Ivan',11), ('b','Harry',4);
create table t1_decimal (a decimal(3,1), b decimal(3,1), c int);
insert into t1_decimal values
(1,1,23),(2,2,11),(3,3,16),
(1,1,12),(1,1,14),(2,3,15),
(2,1,13),(2,3,11),(3,3,16);
create table t2_decimal (a decimal(3,1), b decimal(3,1), c int);
insert into t2_decimal values
(2,1,13),(2,2,11),(3,3,16),
(1,3,22),(1,3,14),(2,2,15),
(2,1,43),(2,3,11),(2,3,16);
create view v1 as select a, b, max(c) as max_c, avg(c) as avg_c from t1 
group by a,b having max_c < 707;
create view v2 as select a, b, max(c) as max_c, avg(c) as avg_c from t1 
where t1.a>5 group by a,b having max_c < 707;
create view v3 as select a, b, min(c) as min_c from t1
where t1.a<10 group by a,b having min_c > 109;
create view v4 as
select a, b, min(max_c) as min_c from v1
where (v1.a<15) group by a,b;
create view v_union as 
select a, b, min(c) as c from t1
where t1.a<10 group by a,b having c > 109
union
select a, b, max(c) as c from t1
where t1.b>10 group by a,b having c < 300;
create view v2_union as 
select a, b, min(c) as c from t1
where t1.a<10 group by a,b having c > 109
union
select a, b, max(c) as c from t1
where t1.b>10 group by a,b having c < 300
union
select a, b, avg(c) as c from t1
where t1.c>300 group by a,b having c < 707;
create view v3_union as 
select a, b, (a+1) as c from t1
where t1.a<10
union
select a, b, c from t1
where t1.b>10 and t1.c>100;
create view v4_union as 
select a, b, max(c)-100 as c from t1
where t1.a<10 group by a,b having c > 109
union
select a, b, (c+100) as c from t1
where t1.b>10;
create view v_double as
select a, avg(a/4) as avg_a, b, c from t1_double
where (b>12.2) group by b,c having (avg_a<22.333);
create view v_char as 
select a, b, max(c) as max_c from t1_char 
group by a,b having max_c < 9;
create view v_decimal as
select a, b, avg(c) as avg_c from t1_decimal
group by a,b having (avg_c>12);
# conjunctive subformula : pushing into HAVING 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	8	64	248	107
6	20	315	279.3333	8	80	800	314
select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	8	64	248	107
6	20	315	279.3333	8	80	800	314
explain select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.max_c>214) and (t2.a>v1.a);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c > 214"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "t2.a > v1.a",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 214",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
8	33	404	213.6667	8	64	248	107
6	20	315	279.3333	6	20	315	279
1	21	500	234.6000	1	19	203	107
8	33	404	213.6667	8	80	800	314
6	20	315	279.3333	6	23	303	909
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
8	33	404	213.6667	8	64	248	107
6	20	315	279.3333	6	20	315	279
1	21	500	234.6000	1	19	203	107
8	33	404	213.6667	8	80	800	314
6	20	315	279.3333	6	23	303	909
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	2	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.max_c > 300",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 300",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into HAVING 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
5	27	132	132.0000	2	3	207	207
5	27	132	132.0000	1	21	909	12
5	27	132	132.0000	1	19	203	107
5	27	132	132.0000	3	12	231	190
select * from v1,t2 where 
((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
5	27	132	132.0000	2	3	207	207
5	27	132	132.0000	1	21	909	12
5	27	132	132.0000	1	19	203	107
5	27	132	132.0000	3	12	231	190
explain select * from v1,t2 where 
((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where 
((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c > 400 or v1.max_c < 135"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.max_c > 400 and t2.a > v1.a or v1.max_c < 135 and t2.a < v1.a",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (max_c > 400 or max_c < 135)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or 
((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
6	20	315	279.3333	6	20	315	279
select * from v1,t2 where
((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or 
((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
6	20	315	279.3333	6	20	315	279
explain select * from v1,t2 where
((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or 
((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where
((v1.max_c>300) and (v1.avg_c>t2.d) and (v1.b=t2.b)) or 
((v1.max_c<135) and (v1.max_c<t2.c) and (v1.a=t2.a));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c > 300 or v1.max_c < 135"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.b = t2.b and v1.max_c > 300 and v1.avg_c > t2.d or v1.a = t2.a and v1.max_c < 135 and v1.max_c < t2.c",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (max_c > 300 or max_c < 135)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformula : pushing into WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	80	800	314
select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	80	800	314
explain select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.a>6) and (t2.b>v1.b);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a > 6"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "t2.b > v1.b",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 6"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v2,t2 where (v2.b>25) and (t2.a<v2.a);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v2.b > 25"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "t2.a < v2.a",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and t1.b > 25"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	2	3	207	207
1	19	107	107.0000	7	13	312	406
1	19	107	107.0000	3	12	231	190
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	1	19	203	107
1	21	500	234.6000	3	12	231	190
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v1,t2 where 
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	2	3	207	207
1	19	107	107.0000	7	13	312	406
1	19	107	107.0000	3	12	231	190
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	1	19	203	107
1	21	500	234.6000	3	12	231	190
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v1,t2 where 
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where 
((v1.a>7) and (t2.c<v1.max_c)) or ((v1.a<2) and (t2.b<v1.b));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a > 7 or v1.a < 2"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a > 7 and t2.c < v1.max_c or v1.a < 2 and t2.b < v1.b",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 7 or t1.a < 2"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2,t2 where 
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	2	3	207	207
6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	1	19	203	107
6	20	315	279.3333	3	12	231	190
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v2,t2 where 
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	2	3	207	207
6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	1	19	203	107
6	20	315	279.3333	3	12	231	190
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v2,t2 where 
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v2,t2 where 
((v2.a>7) and (t2.c<v2.max_c)) or ((v2.a>5) and (t2.b<v2.b));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v2.a > 7 or v2.a > 5"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v2.a > 7 and t2.c < v2.max_c or v2.a > 5 and t2.b < v2.b",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and (t1.a > 7 or t1.a > 5)"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or 
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	8	64	248	107
1	19	107	107.0000	1	19	203	107
5	16	207	207.0000	2	3	207	207
select * from v1,t2 where 
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or 
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	8	64	248	107
1	19	107	107.0000	1	19	203	107
5	16	207	207.0000	2	3	207	207
explain select * from v1,t2 where 
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or 
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where 
((v1.a>4) and (v1.b>t2.b) and (v1.max_c=t2.d)) or 
((v1.a<2) and (v1.max_c<t2.c) and (v1.max_c=t2.d));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a > 4 or v1.a < 2"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a > 4 and v1.b > t2.b and v1.max_c = t2.d or v1.a < 2 and v1.max_c < t2.c and v1.max_c = t2.d",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 4 or t1.a < 2"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformulas : pushing into HAVING and WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	6	23	303	909
select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	6	23	303	909
explain select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.a<2) and (v1.max_c>400) and (t2.b>v1.b);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a < 2 and v1.max_c > 400"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "t2.b > v1.b",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 400",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 2"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_double as v,t2_double as t where
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
a	avg_a	b	c	a	b	c
1	0.50000000	12.5	18.9	1	22.4	14.3333
1	0.50000000	12.5	18.9	1	12.5	18.9
4	1.00000000	33.4	14.3333	4	33.4	14.3333
4	1.00000000	14.3333	13.65	4	33.4	14.3333
5	1.25000000	17.89	7.22	5	22.4	13.65
6	1.50000000	33.4	14.3	6	33.4	14.3333
10	2.62500000	33.4	13.65	10	31.4	13.65
select * from v_double as v,t2_double as t where
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
a	avg_a	b	c	a	b	c
1	0.50000000	12.5	18.9	1	22.4	14.3333
1	0.50000000	12.5	18.9	1	12.5	18.9
4	1.00000000	33.4	14.3333	4	33.4	14.3333
4	1.00000000	14.3333	13.65	4	33.4	14.3333
5	1.25000000	17.89	7.22	5	22.4	13.65
6	1.50000000	33.4	14.3	6	33.4	14.3333
10	2.62500000	33.4	13.65	10	31.4	13.65
explain select * from v_double as v,t2_double as t where
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t.a	2	Using where
2	DERIVED	t1_double	ALL	NULL	NULL	NULL	NULL	9	Using where; Using temporary; Using filesort
explain format=json select * from v_double as v,t2_double as t where
(v.a=t.a) and (v.avg_a>0.45) and (v.b>10);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v.avg_a > 0.45 and v.b > 10",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "avg_a < 22.333 and avg_a > 0.45",
          "filesort": {
            "sort_key": "t1_double.b, t1_double.c",
            "temporary_table": {
              "table": {
                "table_name": "t1_double",
                "access_type": "ALL",
                "rows": 9,
                "filtered": 100,
                "attached_condition": "t1_double.b > 12.2 and t1_double.b > 10"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_decimal as v,t2_decimal as t where
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
a	b	avg_c	a	b	c
3.0	3.0	16.0000	3.0	3.0	16
select * from v_decimal as v,t2_decimal as t where
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
a	b	avg_c	a	b	c
3.0	3.0	16.0000	3.0	3.0	16
explain select * from v_decimal as v,t2_decimal as t where
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	3	test.t.a	2	Using where
2	DERIVED	t1_decimal	ALL	NULL	NULL	NULL	NULL	9	Using where; Using temporary; Using filesort
explain format=json select * from v_decimal as v,t2_decimal as t where
(v.a=t.a) and (v.avg_c>15) and (v.b>1);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "3",
      "used_key_parts": ["a"],
      "ref": ["test.t.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v.avg_c > 15 and v.b > 1",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "avg_c > 12 and avg_c > 15",
          "filesort": {
            "sort_key": "t1_decimal.a, t1_decimal.b",
            "temporary_table": {
              "table": {
                "table_name": "t1_decimal",
                "access_type": "ALL",
                "rows": 9,
                "filtered": 100,
                "attached_condition": "t1_decimal.b > 1"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into HAVING and WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or 
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	2	3	207	207
1	19	107	107.0000	7	13	312	406
1	19	107	107.0000	3	12	231	190
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v1,t2 where 
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or 
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	2	3	207	207
1	19	107	107.0000	7	13	312	406
1	19	107	107.0000	3	12	231	190
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v1,t2 where 
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or 
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where 
((v1.a>7) and (v1.max_c>300) and (t2.c<v1.max_c)) or 
((v1.a<4) and (v1.max_c<500) and (t2.b<v1.b));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a > 7 and v1.max_c > 300 or v1.a < 4 and v1.max_c < 500"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a > 7 and v1.max_c > 300 and t2.c < v1.max_c or v1.a < 4 and v1.max_c < 500 and t2.b < v1.b",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (t1.a > 7 and max_c > 300 or t1.a < 4 and max_c < 500)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 7 or t1.a < 4"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	1	19	203	107
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	80	800	314
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	1	19	203	107
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	80	800	314
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where ((v1.a<2) and (v1.max_c>120)) or (v1.a>7);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a < 2 and v1.max_c > 120 or v1.a > 7"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a < 2 and v1.max_c > 120 or v1.a > 7",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (t1.a < 2 and max_c > 120 or t1.a > 7)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 2 or t1.a > 7"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formulas : pushing into WHERE and HAVING     
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	80	800	314
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v1,t2 where 
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	80	800	314
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v1,t2 where 
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where 
((v1.a<2) and (v1.max_c>120) and (v1.b=t2.b)) or (v1.a>7);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a < 2 and v1.max_c > 120 or v1.a > 7"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.b = t2.b and v1.a < 2 and v1.max_c > 120 or v1.a > 7",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (t1.a < 2 and max_c > 120 or t1.a > 7)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 2 or t1.a > 7"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	8	64	248	107
1	19	107	107.0000	1	19	203	107
5	16	207	207.0000	2	3	207	207
select * from v1,t2 where
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	8	64	248	107
1	19	107	107.0000	1	19	203	107
5	16	207	207.0000	2	3	207	207
explain select * from v1,t2 where
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where
((v1.a<2) and (v1.max_c<200) and (t2.c>v1.max_c) and (v1.max_c=t2.d)) or
((v1.a>4) and (v1.max_c<500) and (t2.b<v1.b) and (v1.max_c=t2.c));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a < 2 and v1.max_c < 200 or v1.a > 4"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a < 2 and v1.max_c < 200 and t2.c > v1.max_c and v1.max_c = t2.d or v1.max_c = t2.c and v1.a > 4 and t2.c < 500 and t2.b < v1.b",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (t1.a < 2 and max_c < 200 or t1.a > 4 and max_c < 500)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 2 or t1.a > 4"
              }
            }
          }
        }
      }
    }
  }
}
# prepare of a query containing extracted or formula
prepare stmt from "select * from v1,t2 where 
  ((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));";
execute stmt;
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
5	27	132	132.0000	2	3	207	207
5	27	132	132.0000	1	21	909	12
5	27	132	132.0000	1	19	203	107
5	27	132	132.0000	3	12	231	190
execute stmt;
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
5	27	132	132.0000	2	3	207	207
5	27	132	132.0000	1	21	909	12
5	27	132	132.0000	1	19	203	107
5	27	132	132.0000	3	12	231	190
deallocate prepare stmt;
prepare stmt from 
"explain format=json select * from v1,t2 where 
    ((v1.max_c>400) and (t2.a>v1.a)) or ((v1.max_c<135) and (t2.a<v1.a));";
execute stmt;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c > 400 or v1.max_c < 135"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.max_c > 400 and t2.a > v1.a or v1.max_c < 135 and t2.a < v1.a",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (max_c > 400 or max_c < 135)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
execute stmt;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c > 400 or v1.max_c < 135"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.max_c > 400 and t2.a > v1.a or v1.max_c < 135 and t2.a < v1.a",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (max_c > 400 or max_c < 135)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
deallocate prepare stmt;
# conjunctive subformula : pushing into WHERE
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
1	19	107	107.0000	1	19	203	107
select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
1	19	107	107.0000	1	19	203	107
explain select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.b	2	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where (t2.a=v1.a) and (v1.b=t2.b) and (v1.a=1);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a = 1 and t2.b is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["test.t2.b"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.a = 1",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a = 1"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
a	b	max_c	avg_c	a	b	c	d
5	16	207	207.0000	2	3	207	207
select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
a	b	max_c	avg_c	a	b	c	d
5	16	207	207.0000	2	3	207	207
explain select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.d	2	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.a=5) and (v1.max_c=t2.d);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.d is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["max_c"],
      "ref": ["test.t2.d"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.a = 5 and v1.max_c = t2.d",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a = 5"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformula : pushing into WHERE using equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
1	19	107	107.0000	1	21	909	12
1	21	500	234.6000	1	19	203	107
1	19	107	107.0000	1	19	203	107
select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
1	19	107	107.0000	1	21	909	12
1	21	500	234.6000	1	19	203	107
1	19	107	107.0000	1	19	203	107
explain select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	2	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where (t2.a<5) and (v1.a=t2.a);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a < 5 and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 5"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
a	b	max_c	avg_c	a	b	c	d
select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
a	b	max_c	avg_c	a	b	c	d
explain select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	10	test.t2.a,test.t2.a	2	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "10",
      "used_key_parts": ["a", "b"],
      "ref": ["test.t2.a", "test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.b = t1.a"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformula : pushing into HAVING using equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
a	b	max_c	avg_c	a	b	c	d
5	16	207	207.0000	2	3	207	207
6	20	315	279.3333	6	20	315	279
select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
a	b	max_c	avg_c	a	b	c	d
5	16	207	207.0000	2	3	207	207
6	20	315	279.3333	6	20	315	279
explain select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.c	2	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where (t2.c>150) and (v1.max_c=t2.c);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.c > 150 and t2.c is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["max_c"],
      "ref": ["test.t2.c"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 150",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# extracted and formula : pushing into WHERE  
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
a	b	max_c	avg_c	a	b	c	d
select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
a	b	max_c	avg_c	a	b	c	d
explain select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
explain format=json select * from v1,t2 where (v1.a=v1.b) and (v1.a=t2.a) and (v1.a=3);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a = 3"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a = 3 and v1.b = 3"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 20,
            "filtered": 100,
            "attached_condition": "t1.a = 3 and t1.b = 3"
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	2	3	207	207
explain select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
explain format=json select * from v1,t2 where (v1.a=1) and (v1.b=21) and (t2.a=2);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a = 2"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a = 1 and v1.b = 21"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 20,
            "filtered": 100,
            "attached_condition": "t1.a = 1 and t1.b = 21"
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_char as v,t2_char as t where 
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
a	b	max_c	a	b	c
c	Harry	4	d	Harry	1
c	Harry	4	b	Harry	4
select * from v_char as v,t2_char as t where 
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
a	b	max_c	a	b	c
c	Harry	4	d	Harry	1
c	Harry	4	b	Harry	4
explain select * from v_char as v,t2_char as t where 
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	12	Using where
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	12	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1_char	ALL	NULL	NULL	NULL	NULL	12	Using where; Using temporary; Using filesort
explain format=json select * from v_char as v,t2_char as t where 
(v.a='c') and (v.b<'Hermes') and ((v.b=t.b) or (v.max_c>20));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 12,
      "filtered": 100,
      "attached_condition": "v.a = 'c' and v.b < 'Hermes'",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 9",
          "filesort": {
            "sort_key": "t1_char.b",
            "temporary_table": {
              "table": {
                "table_name": "t1_char",
                "access_type": "ALL",
                "rows": 12,
                "filtered": 100,
                "attached_condition": "t1_char.a = 'c' and t1_char.b < 'Hermes'"
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "t",
        "access_type": "ALL",
        "rows": 12,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "t.b = v.b or v.max_c > 20"
    }
  }
}
# extracted and formula : pushing into WHERE using equalities
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_decimal as v,t2_decimal as t where
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
a	b	avg_c	a	b	c
1.0	1.0	16.3333	2.0	1.0	13
3.0	3.0	16.0000	3.0	3.0	16
3.0	3.0	16.0000	1.0	3.0	22
3.0	3.0	16.0000	1.0	3.0	14
1.0	1.0	16.3333	2.0	1.0	43
3.0	3.0	16.0000	2.0	3.0	11
3.0	3.0	16.0000	2.0	3.0	16
select * from v_decimal as v,t2_decimal as t where
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
a	b	avg_c	a	b	c
1.0	1.0	16.3333	2.0	1.0	13
3.0	3.0	16.0000	3.0	3.0	16
3.0	3.0	16.0000	1.0	3.0	22
3.0	3.0	16.0000	1.0	3.0	14
1.0	1.0	16.3333	2.0	1.0	43
3.0	3.0	16.0000	2.0	3.0	11
3.0	3.0	16.0000	2.0	3.0	16
explain select * from v_decimal as v,t2_decimal as t where
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	6	test.t.b,test.t.b	2	
2	DERIVED	t1_decimal	ALL	NULL	NULL	NULL	NULL	9	Using where; Using temporary; Using filesort
explain format=json select * from v_decimal as v,t2_decimal as t where
(v.a=v.b) and (v.b=t.b) and ((t.b>1) or (v.a=1));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "(t.b > 1 or t.b = 1) and t.b is not null and t.b is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "6",
      "used_key_parts": ["a", "b"],
      "ref": ["test.t.b", "test.t.b"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "avg_c > 12",
          "filesort": {
            "sort_key": "t1_decimal.a, t1_decimal.b",
            "temporary_table": {
              "table": {
                "table_name": "t1_decimal",
                "access_type": "ALL",
                "rows": 9,
                "filtered": 100,
                "attached_condition": "t1_decimal.b = t1_decimal.a and (t1_decimal.a > 1 or t1_decimal.a = 1)"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into HAVING using equalities     
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	1	19	203	107
5	16	207	207.0000	2	3	207	207
6	20	315	279.3333	6	20	315	279
select * from v1,t2
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	1	19	203	107
5	16	207	207.0000	2	3	207	207
6	20	315	279.3333	6	20	315	279
explain select * from v1,t2
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2
where ((t2.a<4) and (v1.a=t2.a)) or ((t2.c>150) and (v1.max_c=t2.c));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a < 4 or t2.c > 150"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = t2.a and t2.a < 4 or v1.max_c = t2.c and t2.c > 150",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (t1.a < 4 or max_c > 150)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformulas : pushing into WHERE and HAVING using equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279
select * from v1,t2
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279
explain select * from v1,t2
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	10	test.t2.a,test.t2.c	2	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2
where ((t2.a>5) and (v1.a=t2.a)) and ((t2.c>250) and (v1.max_c=t2.c));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a > 5 and t2.c > 250 and t2.a is not null and t2.c is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "10",
      "used_key_parts": ["a", "max_c"],
      "ref": ["test.t2.a", "test.t2.c"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 250",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformulas : pushing into WHERE and HAVING
# pushing equalities    
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	80	800	314
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	80	800	314
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where (v1.a=8) and (v1.a=t2.a) and (v1.max_c=404);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a = 8"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a = 8 and v1.max_c = 404"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c = 404",
          "filesort": {
            "sort_key": "t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a = 8"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformulas : pushing into WHERE and HAVING 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
a	b	max_c	avg_c	a	b	c	d
5	16	207	207.0000	2	3	207	207
select * from v1,t2 where 
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
a	b	max_c	avg_c	a	b	c	d
5	16	207	207.0000	2	3	207	207
explain select * from v1,t2 where 
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.d	2	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,t2 where 
(v1.a>3) and (v1.max_c>200) and (t2.b<v1.b) and (t2.d=v1.max_c);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.d is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["max_c"],
      "ref": ["test.t2.d"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.a > 3 and v1.max_c > 200 and t2.b < v1.b and t2.d = v1.max_c",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 200",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 3"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformula : pushing into WHERE
# extracted or formula : pushing into HAVING using equalities
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_double as v,t2_double as t where
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
a	avg_a	b	c	a	b	c
select * from v_double as v,t2_double as t where
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
a	avg_a	b	c	a	b	c
explain select * from v_double as v,t2_double as t where
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	18	test.t.c,test.t.c	2	Using where
2	DERIVED	t1_double	ALL	NULL	NULL	NULL	NULL	9	Using where; Using temporary; Using filesort
explain format=json select * from v_double as v,t2_double as t where
(v.b=v.c) and (v.c=t.c) and ((t.c>10) or (v.a=1));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t.c is not null and t.c is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "18",
      "used_key_parts": ["b", "c"],
      "ref": ["test.t.c", "test.t.c"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "t.c > 10 or v.a = 1",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "avg_a < 22.333 and (t1_double.b > 10 or t1_double.a = 1)",
          "filesort": {
            "sort_key": "t1_double.b, t1_double.c",
            "temporary_table": {
              "table": {
                "table_name": "t1_double",
                "access_type": "ALL",
                "rows": 9,
                "filtered": 100,
                "attached_condition": "t1_double.c = t1_double.b and t1_double.b > 12.2"
              }
            }
          }
        }
      }
    }
  }
}
# conjunctive subformula : pushing into WHERE
# extracted or formula : pushing into HAVING using equalities 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_double as v,t2_double as t where
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
a	avg_a	b	c	a	b	c
1	0.50000000	12.5	18.9	1	12.5	18.9
1	0.50000000	12.5	18.9	2	22.4	18.9
1	0.50000000	12.5	18.9	7	17.89	18.9
select * from v_double as v,t2_double as t where
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
a	avg_a	b	c	a	b	c
1	0.50000000	12.5	18.9	1	12.5	18.9
1	0.50000000	12.5	18.9	2	22.4	18.9
1	0.50000000	12.5	18.9	7	17.89	18.9
explain select * from v_double as v,t2_double as t where
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	9	test.t.c	2	Using where
2	DERIVED	t1_double	ALL	NULL	NULL	NULL	NULL	9	Using where; Using temporary; Using filesort
explain format=json select * from v_double as v,t2_double as t where
(((v.a>0.2) or (v.b<17)) or (t.c>17)) and (t.c=v.c) and (v.c>18);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t.c > 18 and t.c is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "9",
      "used_key_parts": ["c"],
      "ref": ["test.t.c"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v.a > 0.2 or v.b < 17 or t.c > 17",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "avg_a < 22.333 and (t1_double.a > 0.2 or t1_double.b < 17 or t1_double.c > 17)",
          "filesort": {
            "sort_key": "t1_double.b, t1_double.c",
            "temporary_table": {
              "table": {
                "table_name": "t1_double",
                "access_type": "ALL",
                "rows": 9,
                "filtered": 100,
                "attached_condition": "t1_double.b > 12.2 and t1_double.c > 18"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into WHERE
# conjunctive subformula : pushing into HAVING
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_decimal as v,t2_decimal as t where
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
a	b	avg_c	a	b	c
2.0	1.0	13.0000	2.0	1.0	13
2.0	3.0	13.0000	2.0	1.0	13
2.0	1.0	13.0000	2.0	2.0	11
2.0	3.0	13.0000	2.0	2.0	11
2.0	1.0	13.0000	3.0	3.0	16
2.0	3.0	13.0000	3.0	3.0	16
2.0	1.0	13.0000	1.0	3.0	22
2.0	3.0	13.0000	1.0	3.0	22
2.0	1.0	13.0000	1.0	3.0	14
2.0	3.0	13.0000	1.0	3.0	14
2.0	1.0	13.0000	2.0	2.0	15
2.0	3.0	13.0000	2.0	2.0	15
2.0	1.0	13.0000	2.0	1.0	43
2.0	3.0	13.0000	2.0	1.0	43
2.0	1.0	13.0000	2.0	3.0	11
2.0	3.0	13.0000	2.0	3.0	11
2.0	1.0	13.0000	2.0	3.0	16
2.0	3.0	13.0000	2.0	3.0	16
select * from v_decimal as v,t2_decimal as t where
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
a	b	avg_c	a	b	c
2.0	1.0	13.0000	2.0	1.0	13
2.0	3.0	13.0000	2.0	1.0	13
2.0	1.0	13.0000	2.0	2.0	11
2.0	3.0	13.0000	2.0	2.0	11
2.0	1.0	13.0000	3.0	3.0	16
2.0	3.0	13.0000	3.0	3.0	16
2.0	1.0	13.0000	1.0	3.0	22
2.0	3.0	13.0000	1.0	3.0	22
2.0	1.0	13.0000	1.0	3.0	14
2.0	3.0	13.0000	1.0	3.0	14
2.0	1.0	13.0000	2.0	2.0	15
2.0	3.0	13.0000	2.0	2.0	15
2.0	1.0	13.0000	2.0	1.0	43
2.0	3.0	13.0000	2.0	1.0	43
2.0	1.0	13.0000	2.0	3.0	11
2.0	3.0	13.0000	2.0	3.0	11
2.0	1.0	13.0000	2.0	3.0	16
2.0	3.0	13.0000	2.0	3.0	16
explain select * from v_decimal as v,t2_decimal as t where
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	9	Using join buffer (flat, BNL join)
2	DERIVED	t1_decimal	ALL	NULL	NULL	NULL	NULL	9	Using where; Using temporary; Using filesort
explain format=json select * from v_decimal as v,t2_decimal as t where
(((v.a>4) or (v.a=2)) or (v.b>3)) and (v.avg_c=13);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "(v.a > 4 or v.a = 2 or v.b > 3) and v.avg_c = 13",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "avg_c > 12 and avg_c = 13",
          "filesort": {
            "sort_key": "t1_decimal.a, t1_decimal.b",
            "temporary_table": {
              "table": {
                "table_name": "t1_decimal",
                "access_type": "ALL",
                "rows": 9,
                "filtered": 100,
                "attached_condition": "t1_decimal.a > 4 or t1_decimal.a = 2 or t1_decimal.b > 3"
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "t",
        "access_type": "ALL",
        "rows": 9,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL"
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
a	b	max_c	avg_c	a	b	c	d
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
a	b	max_c	avg_c	a	b	c	d
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	10	test.t2.a,test.t2.a	2	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.a=v1.b);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "10",
      "used_key_parts": ["a", "b"],
      "ref": ["test.t2.a", "test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.max_c > 300",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 300",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.b = t1.a and t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# nothing to push
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (t2.a<2) and (t2.c>900);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	21	500	234.6000	1	21	909	12
5	16	207	207.0000	1	21	909	12
5	27	132	132.0000	1	21	909	12
6	20	315	279.3333	1	21	909	12
8	33	404	213.6667	1	21	909	12
select * from v1,t2 where (t2.a<2) and (t2.c>900);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	21	500	234.6000	1	21	909	12
5	16	207	207.0000	1	21	909	12
5	27	132	132.0000	1	21	909	12
6	20	315	279.3333	1	21	909	12
8	33	404	213.6667	1	21	909	12
explain select * from v1,t2 where (t2.a<2) and (t2.c>900);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where (t2.a<2) and (t2.c>900);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a < 2 and t2.c > 900"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
6	20	315	279.3333	6	20	315	279
1	19	107	107.0000	1	19	203	107
select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
6	20	315	279.3333	6	20	315	279
1	19	107	107.0000	1	19	203	107
explain select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	10	test.t2.a,test.t2.b	2	
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.a=t2.a) and (v1.b=t2.b);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null and t2.b is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "10",
      "used_key_parts": ["a", "b"],
      "ref": ["test.t2.a", "test.t2.b"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	1	19	203	107
6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	80	800	314
select * from v1,t2 where 
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	1	19	203	107
6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	80	800	314
explain select * from v1,t2 where 
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where 
(t2.a=v1.a) or (v1.b=t2.b) and ((v1.a=1) or (v1.a=6));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = t2.a or v1.b = t2.b and (v1.a = 1 or v1.a = 6)",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	2	3	207	207
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	7	13	312	406
1	19	107	107.0000	8	64	248	107
1	19	107	107.0000	6	20	315	279
1	19	107	107.0000	1	19	203	107
1	19	107	107.0000	8	80	800	314
1	19	107	107.0000	3	12	231	190
1	19	107	107.0000	6	23	303	909
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	1	19	203	107
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
5	16	207	207.0000	2	3	207	207
5	27	132	132.0000	2	3	207	207
6	20	315	279.3333	2	3	207	207
8	33	404	213.6667	2	3	207	207
select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	2	3	207	207
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	7	13	312	406
1	19	107	107.0000	8	64	248	107
1	19	107	107.0000	6	20	315	279
1	19	107	107.0000	1	19	203	107
1	19	107	107.0000	8	80	800	314
1	19	107	107.0000	3	12	231	190
1	19	107	107.0000	6	23	303	909
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	1	19	203	107
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
5	16	207	207.0000	2	3	207	207
5	27	132	132.0000	2	3	207	207
6	20	315	279.3333	2	3	207	207
8	33	404	213.6667	2	3	207	207
explain select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where (v1.a=1) or (v1.b=21) or (t2.a=2);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = 1 or v1.b = 21 or t2.a = 2",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	21	500	234.6000	1	21	909	12
5	16	207	207.0000	1	21	909	12
5	27	132	132.0000	1	21	909	12
6	20	315	279.3333	1	21	909	12
8	33	404	213.6667	1	21	909	12
select * from v1,t2 where 
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	21	500	234.6000	1	21	909	12
5	16	207	207.0000	1	21	909	12
5	27	132	132.0000	1	21	909	12
6	20	315	279.3333	1	21	909	12
8	33	404	213.6667	1	21	909	12
explain select * from v1,t2 where 
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,t2 where 
(t2.a<2) and (t2.c>900) and ((v1.a<t2.a) or (t2.a<11));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a < 2 and t2.c > 900"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a < t2.a or t2.a < 11",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# using several derived tables : nothing to push
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where 
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	8	33	404	213.6667	8	64	248	107
6	20	315	279.3333	6	20	315	279.3333	6	20	315	279
8	33	404	213.6667	8	33	404	213.6667	8	80	800	314
6	20	315	279.3333	6	20	315	279.3333	6	23	303	909
select * from v1,v2,t2 where 
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
8	33	404	213.6667	8	33	404	213.6667	8	64	248	107
6	20	315	279.3333	6	20	315	279.3333	6	20	315	279
8	33	404	213.6667	8	33	404	213.6667	8	80	800	314
6	20	315	279.3333	6	20	315	279.3333	6	23	303	909
explain select * from v1,v2,t2 where 
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key1	key1	5	test.t2.a	2	
1	PRIMARY	<derived3>	ref	key0	key0	5	test.t2.a	2	Using where
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,v2,t2 where 
(v1.a=v2.a) and (v1.a=t2.a) and (v2.b<50);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key1"],
      "key": "key1",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v2.b < 50",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and t1.b < 50"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279.3333	2	3	207	207
6	20	315	279.3333	6	20	315	279.3333	1	21	909	12
6	20	315	279.3333	6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	20	315	279.3333	1	19	203	107
6	20	315	279.3333	6	20	315	279.3333	3	12	231	190
6	20	315	279.3333	6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	8	33	404	213.6667	6	23	303	909
select * from v1,v2,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279.3333	2	3	207	207
6	20	315	279.3333	6	20	315	279.3333	1	21	909	12
6	20	315	279.3333	6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	20	315	279.3333	1	19	203	107
6	20	315	279.3333	6	20	315	279.3333	3	12	231	190
6	20	315	279.3333	6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	8	33	404	213.6667	6	23	303	909
explain select * from v1,v2,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived3>	ref	key0	key0	5	v1.b	2	Using where
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,v2,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and (t2.b<50) and (v1.b=v2.b);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.b < 50"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.b is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["v1.b"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v2.a = v1.a or v1.a = t2.a",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where 
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	33	404	213.6667	8	80	800	314
select * from v1,v2,t2 where 
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	8	33	404	213.6667	8	80	800	314
explain select * from v1,v2,t2 where 
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (incremental, BNL join)
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,v2,t2 where 
((v1.a=v2.a) and (v1.a=t2.a)) or ((v2.b>13) and (t2.c<115));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = t2.a or t2.c < 115",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived3>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "incremental",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = t2.a and v2.a = t2.a or v2.b > 13 and t2.c < 115",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# using several derived tables : pushing in all tables
# conjunctive subformula : pushing into HAVING
# extracted or formula : pushing into WHERE
# pushing equalities  
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and 
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	6	20	315	279.3333	1	21	909	12
1	19	107	107.0000	6	20	315	279.3333	1	19	203	107
1	19	107	107.0000	8	33	404	213.6667	1	21	909	12
1	19	107	107.0000	8	33	404	213.6667	1	19	203	107
select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and 
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	6	20	315	279.3333	1	21	909	12
1	19	107	107.0000	6	20	315	279.3333	1	19	203	107
1	19	107	107.0000	8	33	404	213.6667	1	21	909	12
1	19	107	107.0000	8	33	404	213.6667	1	19	203	107
explain select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and 
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (incremental, BNL join)
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,v2,t2 where ((v1.a=v2.a) or (v1.a=t2.a)) and 
((v2.b<50) or (v2.b=19)) and (v1.max_c<300);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c < 300"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c < 300",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived3>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v2.b < 50 or v2.b = 19"
      },
      "buffer_type": "incremental",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "(v2.a = v1.a or v1.a = t2.a) and (v2.b < 50 or v2.b = 19)",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and (t1.b < 50 or t1.b = 19)"
              }
            }
          }
        }
      }
    }
  }
}
# using several derived tables : pushing only in one table
# conjunctive subformula : pushing into WHERE
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where 
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
select * from v1,v2,t2 where 
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
explain select * from v1,v2,t2 where 
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key1	key1	10	test.t2.a,test.t2.a	2	
1	PRIMARY	<derived3>	ref	key0	key0	5	test.t2.a	2	Using where
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,v2,t2 where 
(v1.a=t2.a) and (v1.a=v1.b) and (v1.a=v2.a) and (v2.max_c<300);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null and t2.a is not null and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key1"],
      "key": "key1",
      "key_length": "10",
      "used_key_parts": ["a", "b"],
      "ref": ["test.t2.a", "test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.b = t1.a"
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v2.max_c < 300",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707 and max_c < 300",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# using several derived tables : pushing only in one table
# extracted and formula : pushing into WHERE
# conjunctive subformula : pushing into WHERE using equalities
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	c	d
explain select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived3>	ref	key0	key0	5	v1.b	2	
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v1,v2,t2 where (v1.a=1) and (v1.b>10) and (v1.b=v2.b);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a = 1 and v1.b > 10"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.b is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a = 1 and t1.b > 10"
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["v1.b"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and t1.b > 10"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into WHERE
# conjunctive subformula : pushing into WHERE using equalities
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_char as v,t2_char as t where 
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
a	b	max_c	a	b	c
b	Vika	2	b	Ivan	1
b	Vika	2	b	Ali	6
b	Vika	2	b	Hermes	3
b	Vika	2	b	Ivan	11
b	Vika	2	b	Harry	4
select * from v_char as v,t2_char as t where 
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
a	b	max_c	a	b	c
b	Vika	2	b	Ivan	1
b	Vika	2	b	Ali	6
b	Vika	2	b	Hermes	3
b	Vika	2	b	Ivan	11
b	Vika	2	b	Harry	4
explain select * from v_char as v,t2_char as t where 
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	12	Using where
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	12	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1_char	ALL	NULL	NULL	NULL	NULL	12	Using where; Using temporary; Using filesort
explain format=json select * from v_char as v,t2_char as t where 
(v.a=t.a) and (t.a='b') and ((v.b='Vika') or (v.b='Ali'));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 12,
      "filtered": 100,
      "attached_condition": "v.a = 'b' and (v.b = 'Vika' or v.b = 'Ali')",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 9",
          "filesort": {
            "sort_key": "t1_char.b",
            "temporary_table": {
              "table": {
                "table_name": "t1_char",
                "access_type": "ALL",
                "rows": 12,
                "filtered": 100,
                "attached_condition": "t1_char.a = 'b' and (t1_char.b = 'Vika' or t1_char.b = 'Ali')"
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "t",
        "access_type": "ALL",
        "rows": 12,
        "filtered": 100,
        "attached_condition": "t.a = 'b'"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL"
    }
  }
}
# using several derived tables : pushing in all tables
# extracted or formula : pushing into WHERE
# conjunctive subformulas : pushing into HAVING  
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,v2,v3,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33)) 
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	min_c	a	b	c	d
6	20	315	279.3333	6	20	315	279.3333	7	11	708	7	13	312	406
6	20	315	279.3333	6	20	315	279.3333	8	33	114	8	64	248	107
6	20	315	279.3333	6	20	315	279.3333	6	20	214	6	20	315	279
6	20	315	279.3333	6	20	315	279.3333	8	33	114	8	80	800	314
6	20	315	279.3333	6	20	315	279.3333	6	20	214	6	23	303	909
6	20	315	279.3333	8	33	404	213.6667	6	20	214	6	20	315	279
6	20	315	279.3333	8	33	404	213.6667	6	20	214	6	23	303	909
8	33	404	213.6667	6	20	315	279.3333	8	33	114	8	64	248	107
8	33	404	213.6667	6	20	315	279.3333	8	33	114	8	80	800	314
8	33	404	213.6667	8	33	404	213.6667	7	11	708	7	13	312	406
8	33	404	213.6667	8	33	404	213.6667	8	33	114	8	64	248	107
8	33	404	213.6667	8	33	404	213.6667	6	20	214	6	20	315	279
8	33	404	213.6667	8	33	404	213.6667	8	33	114	8	80	800	314
8	33	404	213.6667	8	33	404	213.6667	6	20	214	6	23	303	909
select * from v1,v2,v3,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33)) 
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
a	b	max_c	avg_c	a	b	max_c	avg_c	a	b	min_c	a	b	c	d
6	20	315	279.3333	6	20	315	279.3333	7	11	708	7	13	312	406
6	20	315	279.3333	6	20	315	279.3333	8	33	114	8	64	248	107
6	20	315	279.3333	6	20	315	279.3333	6	20	214	6	20	315	279
6	20	315	279.3333	6	20	315	279.3333	8	33	114	8	80	800	314
6	20	315	279.3333	6	20	315	279.3333	6	20	214	6	23	303	909
6	20	315	279.3333	8	33	404	213.6667	6	20	214	6	20	315	279
6	20	315	279.3333	8	33	404	213.6667	6	20	214	6	23	303	909
8	33	404	213.6667	6	20	315	279.3333	8	33	114	8	64	248	107
8	33	404	213.6667	6	20	315	279.3333	8	33	114	8	80	800	314
8	33	404	213.6667	8	33	404	213.6667	7	11	708	7	13	312	406
8	33	404	213.6667	8	33	404	213.6667	8	33	114	8	64	248	107
8	33	404	213.6667	8	33	404	213.6667	6	20	214	6	20	315	279
8	33	404	213.6667	8	33	404	213.6667	8	33	114	8	80	800	314
8	33	404	213.6667	8	33	404	213.6667	6	20	214	6	23	303	909
explain select * from v1,v2,v3,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33)) 
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	test.t2.a	2	Using where
1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (incremental, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
explain format=json select * from v1,v2,v3,t2 where 
((v1.a=v2.a) or (v1.a=t2.a)) and ((v3.b<50) or (v3.b=33)) 
and (v1.max_c<500) and (v3.a=t2.a) and (v2.max_c>300);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v3.b < 50 or v3.b = 33",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "min_c > 109",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 10 and (t1.b < 50 or t1.b = 33)"
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived3>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v2.max_c > 300"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "max_c < 707 and max_c > 300",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.max_c < 500"
      },
      "buffer_type": "incremental",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = v2.a or v1.a = t2.a",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c < 500",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# using several derived tables : pushing in all tables
# conjunctive subformulas : pushing into HAVING 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
a	b	max_c	avg_c	a	b	min_c	a	b	c	d
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
a	b	max_c	avg_c	a	b	min_c	a	b	c	d
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key1	key1	5	test.t2.b	2	Using where
1	PRIMARY	<derived3>	ref	key0	key0	5	v1.a	2	Using where
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
t2 where (v1.a=v2.a) and (v1.b=t2.b) and (v1.max_c>130) and (v2.min_c<130);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.b is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key1"],
      "key": "key1",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["test.t2.b"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.max_c > 130 and v1.a is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 130",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["v1.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v2.min_c < 130",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "min_c < 707 and min_c < 130",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# using several derived tables : pushing in all tables
# extracted or formulas : pushing into HAVING
# conjunctive subformula : pushing into HAVING 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
(select a, b, avg(c) as avg_c from t1
where t1.a<8 group by a,b) v3,
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
a	b	max_c	avg_c	a	b	min_c	a	b	avg_c	a	b	c	d
8	33	404	213.6667	8	33	114	1	33	497.5000	2	3	207	207
8	33	404	213.6667	8	33	114	1	33	497.5000	1	21	909	12
8	33	404	213.6667	8	33	114	1	33	497.5000	7	13	312	406
8	33	404	213.6667	8	33	114	1	33	497.5000	8	64	248	107
8	33	404	213.6667	8	33	114	1	33	497.5000	6	20	315	279
8	33	404	213.6667	8	33	114	1	33	497.5000	1	19	203	107
8	33	404	213.6667	8	33	114	1	33	497.5000	8	80	800	314
8	33	404	213.6667	8	33	114	1	33	497.5000	3	12	231	190
8	33	404	213.6667	8	33	114	1	33	497.5000	6	23	303	909
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
(select a, b, avg(c) as avg_c from t1
where t1.a<8 group by a,b) v3,
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
a	b	max_c	avg_c	a	b	min_c	a	b	avg_c	a	b	c	d
8	33	404	213.6667	8	33	114	1	33	497.5000	2	3	207	207
8	33	404	213.6667	8	33	114	1	33	497.5000	1	21	909	12
8	33	404	213.6667	8	33	114	1	33	497.5000	7	13	312	406
8	33	404	213.6667	8	33	114	1	33	497.5000	8	64	248	107
8	33	404	213.6667	8	33	114	1	33	497.5000	6	20	315	279
8	33	404	213.6667	8	33	114	1	33	497.5000	1	19	203	107
8	33	404	213.6667	8	33	114	1	33	497.5000	8	80	800	314
8	33	404	213.6667	8	33	114	1	33	497.5000	3	12	231	190
8	33	404	213.6667	8	33	114	1	33	497.5000	6	23	303	909
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
(select a, b, avg(c) as avg_c from t1
where t1.a<8 group by a,b) v3,
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived3>	ref	key0	key0	5	v1.a	2	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	v1.b	2	Using where
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1,
(select a, b, min(c) as min_c from t1
where t1.a>5 group by a,b having min_c < 707) v2,
(select a, b, avg(c) as avg_c from t1
where t1.a<8 group by a,b) v3,
t2 where (v1.a=v2.a) and (v1.b=v3.b) and ((v3.avg_c>170) or (v3.a<5))
and ((v1.avg_c<400) or (v1.a>1)) and (v2.min_c<200);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.avg_c < 400 or v1.a > 1"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "(v1.avg_c < 400 or v1.a > 1) and v1.a is not null and v1.b is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (avg_c < 400 or t1.a > 1)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["v1.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v2.min_c < 200",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "having_condition": "min_c < 707 and min_c < 200",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["v1.b"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v3.avg_c > 170 or v3.a < 5",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "avg_c > 170 or t1.a < 5",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a < 8"
              }
            }
          }
        }
      }
    }
  }
}
# extracted or formula : pushing into HAVING
# conjunctive subformula : pushing into WHERE        
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
a	b	max_c	avg_c	a	b	c	d
5	27	132	132.0000	2	3	207	207
5	27	132	132.0000	1	21	909	12
5	27	132	132.0000	7	13	312	406
5	27	132	132.0000	8	64	248	107
5	27	132	132.0000	6	20	315	279
5	27	132	132.0000	1	19	203	107
5	27	132	132.0000	8	80	800	314
5	27	132	132.0000	3	12	231	190
5	27	132	132.0000	6	23	303	909
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
a	b	max_c	avg_c	a	b	c	d
5	27	132	132.0000	2	3	207	207
5	27	132	132.0000	1	21	909	12
5	27	132	132.0000	7	13	312	406
5	27	132	132.0000	8	64	248	107
5	27	132	132.0000	6	20	315	279
5	27	132	132.0000	1	19	203	107
5	27	132	132.0000	8	80	800	314
5	27	132	132.0000	3	12	231	190
5	27	132	132.0000	6	23	303	909
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
group by a,b having max_c < 707) v1, 
t2 where ((v1.a=1) or (v1.max_c<300)) and (v1.b>25);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "(v1.a = 1 or v1.max_c < 300) and v1.b > 25"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v1.a = 1 or v1.max_c < 300",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and (t1.a = 1 or max_c < 300)",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.b > 25"
              }
            }
          }
        }
      }
    }
  }
}
# extracted and formula : pushing into WHERE
# conjunctive subformula : pushing into HAVING          
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	23	303	909
select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
a	b	max_c	avg_c	a	b	c	d
6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	23	303	909
explain select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	2	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from
(select a, b, max(c) as max_c, avg(c) as avg_c from t1
where t1.a>5 group by a,b having max_c < 707) v1, 
t2 where (v1.a=t2.a) and (v1.max_c>300) and (v1.b<30);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.max_c > 300 and v1.b < 30",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 707 and max_c > 300",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and t1.b < 30"
              }
            }
          }
        }
      }
    }
  }
}
# using query with union
# conjunctive subformula : pushing into WHERE
# conjunctive subformulas : pushing into HAVING and WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
union
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
8	33	404	213.6667	6	23	303	909
select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
union
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
a	b	max_c	avg_c	a	b	c	d
1	21	500	234.6000	1	21	909	12
8	33	404	213.6667	6	23	303	909
explain select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
union
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived3>	ref	key0	key0	5	test.t2.b	2	Using where
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	UNION	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
2	UNION	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (t2.c>800)
union
select * from v1,t2 where (v1.max_c>100) and (v1.a>7) and (t2.d>800);
EXPLAIN
{
  "query_block": {
    "union_result": {
      "table_name": "<union1,2>",
      "access_type": "ALL",
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100,
              "attached_condition": "t2.c > 800 and t2.b is not null"
            },
            "table": {
              "table_name": "<derived3>",
              "access_type": "ref",
              "possible_keys": ["key0"],
              "key": "key0",
              "key_length": "5",
              "used_key_parts": ["b"],
              "ref": ["test.t2.b"],
              "rows": 2,
              "filtered": 100,
              "attached_condition": "v1.a < 5",
              "materialized": {
                "query_block": {
                  "select_id": 3,
                  "having_condition": "max_c < 707",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a < 5"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "UNION",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100,
              "attached_condition": "t2.d > 800"
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived4>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.max_c > 100 and v1.a > 7"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "materialized": {
                "query_block": {
                  "select_id": 4,
                  "having_condition": "max_c < 707 and max_c > 100",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a > 7"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      ]
    }
  }
}
# using query with union
# extracted and formula : pushing into WHERE   
# extracted or formula : pushing into HAVING    
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
union 
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	8	64	248	107
6	20	315	279.3333	8	80	800	314
select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
union 
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	2	3	207	207
1	21	500	234.6000	7	13	312	406
1	21	500	234.6000	8	64	248	107
1	21	500	234.6000	6	20	315	279
1	21	500	234.6000	8	80	800	314
1	21	500	234.6000	3	12	231	190
1	21	500	234.6000	6	23	303	909
6	20	315	279.3333	7	13	312	406
6	20	315	279.3333	8	64	248	107
6	20	315	279.3333	8	80	800	314
explain select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
union 
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	UNION	t2	ALL	NULL	NULL	NULL	NULL	9	
2	UNION	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v1,t2 where (v1.a<5) and (v1.b=t2.b) and (v1.b=19)
union 
select * from v1,t2 where ((v1.max_c>400) or (v1.avg_c>270)) and (v1.a<t2.a);
EXPLAIN
{
  "query_block": {
    "union_result": {
      "table_name": "<union1,2>",
      "access_type": "ALL",
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100,
              "attached_condition": "t2.b = 19"
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.b = 19 and v1.a < 5"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "materialized": {
                "query_block": {
                  "select_id": 3,
                  "having_condition": "max_c < 707",
                  "filesort": {
                    "sort_key": "t1.a",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.b = 19 and t1.a < 5"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "UNION",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived4>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.max_c > 400 or v1.avg_c > 270"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "attached_condition": "(v1.max_c > 400 or v1.avg_c > 270) and v1.a < t2.a",
              "materialized": {
                "query_block": {
                  "select_id": 4,
                  "having_condition": "max_c < 707 and (max_c > 400 or avg_c > 270)",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100
                      }
                    }
                  }
                }
              }
            }
          }
        }
      ]
    }
  }
}
# using query with union
# extracted or formula : pushing into HAVING 
# extracted or formula : pushing into WHERE
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
union
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	1	19	203	107
6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	80	800	314
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
select * from v1,t2 where 
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
union
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
1	21	500	234.6000	1	21	909	12
1	21	500	234.6000	1	19	203	107
6	20	315	279.3333	6	20	315	279
6	20	315	279.3333	6	23	303	909
8	33	404	213.6667	2	3	207	207
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	7	13	312	406
8	33	404	213.6667	8	64	248	107
8	33	404	213.6667	6	20	315	279
8	33	404	213.6667	1	19	203	107
8	33	404	213.6667	8	80	800	314
8	33	404	213.6667	3	12	231	190
8	33	404	213.6667	6	23	303	909
explain select * from v1,t2 where 
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
union
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	UNION	t2	ALL	NULL	NULL	NULL	NULL	9	
2	UNION	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
NULL	UNION RESULT	<union1,2>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v1,t2 where 
((t2.a=v1.a) or (v1.b=t2.b)) and ((v1.a=1) or (v1.a=6))
union
select * from v1,t2 where ((v1.a>3) and (v1.b>27)) or (v1.max_c>550);
EXPLAIN
{
  "query_block": {
    "union_result": {
      "table_name": "<union1,2>",
      "access_type": "ALL",
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a = 1 or v1.a = 6"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "attached_condition": "(v1.a = t2.a or v1.b = t2.b) and (v1.a = 1 or v1.a = 6)",
              "materialized": {
                "query_block": {
                  "select_id": 3,
                  "having_condition": "max_c < 707",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a = 1 or t1.a = 6"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "UNION",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived4>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a > 3 and v1.b > 27 or v1.max_c > 550"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "attached_condition": "v1.a > 3 and v1.b > 27 or v1.max_c > 550",
              "materialized": {
                "query_block": {
                  "select_id": 4,
                  "having_condition": "max_c < 707 and (t1.a > 3 and t1.b > 27 or max_c > 550)",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100
                      }
                    }
                  }
                }
              }
            }
          }
        }
      ]
    }
  }
}
# using query with union
# extracted or formula : pushing into HAVING 
# conjunctive subformulas : pushing into WHERE 
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v1,t2 where 
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
union
select * from v2,t2 where
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
union
select * from v2,t2 where
(v2.max_c=t2.c) and (v2.b<10);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
6	20	315	279.3333	1	21	909	12
6	20	315	279.3333	1	19	203	107
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	1	19	203	107
select * from v1,t2 where 
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
union
select * from v2,t2 where
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
union
select * from v2,t2 where
(v2.max_c=t2.c) and (v2.b<10);
a	b	max_c	avg_c	a	b	c	d
1	19	107	107.0000	1	21	909	12
1	19	107	107.0000	1	19	203	107
6	20	315	279.3333	1	21	909	12
6	20	315	279.3333	1	19	203	107
8	33	404	213.6667	1	21	909	12
8	33	404	213.6667	1	19	203	107
explain select * from v1,t2 where 
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
union
select * from v2,t2 where
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
union
select * from v2,t2 where
(v2.max_c=t2.c) and (v2.b<10);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	UNION	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
2	UNION	<derived5>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
5	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
3	UNION	<derived6>	ref	key0	key0	5	test.t2.c	2	Using where
6	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union1,2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v1,t2 where 
((v1.a=1) and (v1.a=t2.a)) and ((v1.max_c<500) or (v1.avg_c>500))
union
select * from v2,t2 where
((v2.a<t2.b) or (v2.max_c>200)) and (v2.b>10) and (t2.a<2)
union
select * from v2,t2 where
(v2.max_c=t2.c) and (v2.b<10);
EXPLAIN
{
  "query_block": {
    "union_result": {
      "table_name": "<union1,2,3>",
      "access_type": "ALL",
      "query_specifications": [
        {
          "query_block": {
            "select_id": 1,
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100,
              "attached_condition": "t2.a = 1"
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived4>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a = 1 and (v1.max_c < 500 or v1.avg_c > 500)"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "attached_condition": "v1.max_c < 500 or v1.avg_c > 500",
              "materialized": {
                "query_block": {
                  "select_id": 4,
                  "having_condition": "max_c < 707 and (max_c < 500 or avg_c > 500)",
                  "filesort": {
                    "sort_key": "t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a = 1"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        {
          "query_block": {
            "select_id": 2,
            "operation": "UNION",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100,
              "attached_condition": "t2.a < 2"
            },
            "block-nl-join": {
              "table": {
                "table_name": "<derived5>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v2.b > 10"
              },
              "buffer_type": "flat",
              "buffer_size": "256Kb",
              "join_type": "BNL",
              "attached_condition": "v2.a < t2.b or v2.max_c > 200",
              "materialized": {
                "query_block": {
                  "select_id": 5,
                  "having_condition": "max_c < 707",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a > 5 and t1.b > 10"
                      }
                    }
                  }
                }
              }
            }
          }
        },
        {
          "query_block": {
            "select_id": 3,
            "operation": "UNION",
            "table": {
              "table_name": "t2",
              "access_type": "ALL",
              "rows": 9,
              "filtered": 100,
              "attached_condition": "t2.c is not null"
            },
            "table": {
              "table_name": "<derived6>",
              "access_type": "ref",
              "possible_keys": ["key0"],
              "key": "key0",
              "key_length": "5",
              "used_key_parts": ["max_c"],
              "ref": ["test.t2.c"],
              "rows": 2,
              "filtered": 100,
              "attached_condition": "v2.b < 10",
              "materialized": {
                "query_block": {
                  "select_id": 6,
                  "having_condition": "max_c < 707",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a > 5 and t1.b < 10"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      ]
    }
  }
}
# using derived table with union
# conjunctive subformulas : pushing into WHERE and HAVING
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
a	b	c	a	b	c	d
1	19	107	2	3	207	207
1	19	107	1	21	909	12
1	19	107	7	13	312	406
1	19	107	8	64	248	107
1	19	107	6	20	315	279
1	19	107	1	19	203	107
1	19	107	8	80	800	314
1	19	107	3	12	231	190
1	19	107	6	23	303	909
select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
a	b	c	a	b	c	d
1	19	107	2	3	207	207
1	19	107	1	21	909	12
1	19	107	7	13	312	406
1	19	107	8	64	248	107
1	19	107	6	20	315	279
1	19	107	1	19	203	107
1	19	107	8	80	800	314
1	19	107	3	12	231	190
1	19	107	6	23	303	909
explain select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	40	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v_union,t2 where (v_union.a<3) and (v_union.c>100);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 40,
        "filtered": 100,
        "attached_condition": "v_union.a < 3 and v_union.c > 100"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109 and c > 100",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a < 10 and t1.a < 3"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "having_condition": "c < 300 and c > 100",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.b > 10 and t1.a < 3"
                      }
                    }
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union
# conjunctive subformula : pushing into WHERE
# extracted or formula : pushing into HAVING 
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,t2 where
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
a	b	c	a	b	c	d
1	19	107	2	3	207	207
1	19	107	1	21	909	12
1	19	107	7	13	312	406
1	19	107	8	64	248	107
1	19	107	6	20	315	279
1	19	107	1	19	203	107
1	19	107	8	80	800	314
1	19	107	3	12	231	190
1	19	107	6	23	303	909
select * from v_union,t2 where
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
a	b	c	a	b	c	d
1	19	107	2	3	207	207
1	19	107	1	21	909	12
1	19	107	7	13	312	406
1	19	107	8	64	248	107
1	19	107	6	20	315	279
1	19	107	1	19	203	107
1	19	107	8	80	800	314
1	19	107	3	12	231	190
1	19	107	6	23	303	909
explain select * from v_union,t2 where
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	40	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v_union,t2 where
((v_union.a<2) or (v_union.c>800)) and (v_union.b>12);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 40,
        "filtered": 100,
        "attached_condition": "(v_union.a < 2 or v_union.c > 800) and v_union.b > 12"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v_union.a < 2 or v_union.c > 800",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109 and (t1.a < 2 or c > 800)",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a < 10 and t1.b > 12"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "having_condition": "c < 300 and (t1.a < 2 or c > 800)",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.b > 10 and t1.b > 12"
                      }
                    }
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union
# conjunctive subformula : pushing into HAVING
# conjunctive subformula : pushing into WHERE
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,t2 where
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
a	b	c	a	b	c	d
1	19	107	1	21	909	12
1	19	107	1	19	203	107
select * from v_union,t2 where
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
a	b	c	a	b	c	d
1	19	107	1	21	909	12
1	19	107	1	19	203	107
explain select * from v_union,t2 where
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	40	Using where; Using join buffer (flat, BNL join)
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v_union,t2 where
(v_union.a=1) and (v_union.a=t2.a) and (v_union.c<200);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a = 1"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 40,
        "filtered": 100,
        "attached_condition": "v_union.a = 1 and v_union.c < 200"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109 and c < 200",
                  "filesort": {
                    "sort_key": "t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a = 1"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "having_condition": "c < 300 and c < 200",
                  "filesort": {
                    "sort_key": "t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a = 1 and t1.b > 10"
                      }
                    }
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_char as v,t2_char as t where 
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
a	b	max_c	a	b	c
c	Vika	7	c	Vinny	3
c	Vika	7	c	Inga	9
c	Vika	7	c	Ivan	2
c	Vika	7	c	Inga	2
select * from v_char as v,t2_char as t where 
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
a	b	max_c	a	b	c
c	Vika	7	c	Vinny	3
c	Vika	7	c	Inga	9
c	Vika	7	c	Ivan	2
c	Vika	7	c	Inga	2
explain select * from v_char as v,t2_char as t where 
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t	ALL	NULL	NULL	NULL	NULL	12	Using where
1	PRIMARY	<derived2>	ref	key0	key0	2	test.t.a	2	Using where
2	DERIVED	t1_char	ALL	NULL	NULL	NULL	NULL	12	Using where; Using temporary; Using filesort
explain format=json select * from v_char as v,t2_char as t where 
(v.a=t.a) and (v.b='Vika') and (v.max_c>2);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t",
      "access_type": "ALL",
      "rows": 12,
      "filtered": 100,
      "attached_condition": "t.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "2",
      "used_key_parts": ["a"],
      "ref": ["test.t.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v.b = 'Vika' and v.max_c > 2",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "max_c < 9 and max_c > 2",
          "filesort": {
            "sort_key": "t1_char.a",
            "temporary_table": {
              "table": {
                "table_name": "t1_char",
                "access_type": "ALL",
                "rows": 12,
                "filtered": 100,
                "attached_condition": "t1_char.b = 'Vika'"
              }
            }
          }
        }
      }
    }
  }
}
# using derived table with union
# using several derived tables : pushing in all tables
# conjunctive subformula : pushing into WHERE using equalities
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v_union,v1,t2 where
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1) 
and ((v_union.c>800) or (v1.max_c>200));
a	b	c	a	b	max_c	avg_c	a	b	c	d
1	19	107	1	21	500	234.6000	1	21	909	12
1	19	107	1	21	500	234.6000	1	19	203	107
select * from v_union,v1,t2 where
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1) 
and ((v_union.c>800) or (v1.max_c>200));
a	b	c	a	b	max_c	avg_c	a	b	c	d
1	19	107	1	21	500	234.6000	1	21	909	12
1	19	107	1	21	500	234.6000	1	19	203	107
explain select * from v_union,v1,t2 where
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1) 
and ((v_union.c>800) or (v1.max_c>200));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	40	Using where; Using join buffer (incremental, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v_union,v1,t2 where
(v_union.a=v1.a) and (v1.a=t2.a) and (t2.a=1) 
and ((v_union.c>800) or (v1.max_c>200));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a = 1"
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived4>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a = 1"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a = 1"
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 40,
        "filtered": 100,
        "attached_condition": "v_union.a = 1"
      },
      "buffer_type": "incremental",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "v_union.c > 800 or v1.max_c > 200",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109",
                  "filesort": {
                    "sort_key": "t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a = 1"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "having_condition": "c < 300",
                  "filesort": {
                    "sort_key": "t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a = 1 and t1.b > 10"
                      }
                    }
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union   
# extracted or formula : pushing into WHERE    
# conjunctive subformula : pushing into HAVING
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v2_union as v,t2 where 
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
a	b	c	a	b	c	d
8	33	404.0000	8	64	248	107
6	20	312.0000	6	20	315	279
6	20	214.0000	6	20	315	279
8	33	404.0000	8	80	800	314
6	20	312.0000	6	23	303	909
6	20	214.0000	6	23	303	909
select * from v2_union as v,t2 where 
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
a	b	c	a	b	c	d
8	33	404.0000	8	64	248	107
6	20	312.0000	6	20	315	279
6	20	214.0000	6	20	315	279
8	33	404.0000	8	80	800	314
6	20	312.0000	6	23	303	909
6	20	214.0000	6	23	303	909
explain select * from v2_union as v,t2 where 
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	6	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
4	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
NULL	UNION RESULT	<union2,3,4>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v2_union as v,t2 where 
((v.a=6) or (v.a=8)) and (v.c>200) and (v.a=t2.a);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "(t2.a = 6 or t2.a = 8) and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 6,
      "filtered": 100,
      "attached_condition": "v.c > 200",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3,4>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109 and c > 200",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a < 10 and (t1.a = 6 or t1.a = 8)"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "having_condition": "c < 300 and c > 200",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.b > 10 and (t1.a = 6 or t1.a = 8)"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 4,
                  "operation": "UNION",
                  "having_condition": "c < 707 and c > 200",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.c > 300 and (t1.a = 6 or t1.a = 8)"
                      }
                    }
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union of selects without aggregation
# extracted conjunctive predicate: pushing in WHERE of both selects
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
a	b	c	a	b	c	d
1	21	123	1	21	909	12
1	21	101	1	21	909	12
1	21	104	1	21	909	12
1	33	988	1	21	909	12
1	19	107	1	21	909	12
1	21	500	1	21	909	12
1	21	345	1	21	909	12
7	11	708	7	13	312	406
7	11	8	7	13	312	406
8	33	404	8	64	248	107
8	33	123	8	64	248	107
8	33	114	8	64	248	107
8	33	9	8	64	248	107
6	20	214	6	20	315	279
6	20	315	6	20	315	279
6	20	309	6	20	315	279
6	20	7	6	20	315	279
1	21	123	1	19	203	107
1	21	101	1	19	203	107
1	21	104	1	19	203	107
1	33	988	1	19	203	107
1	19	107	1	19	203	107
1	21	500	1	19	203	107
1	21	345	1	19	203	107
8	33	404	8	80	800	314
8	33	123	8	80	800	314
8	33	114	8	80	800	314
8	33	9	8	80	800	314
6	20	214	6	23	303	909
6	20	315	6	23	303	909
6	20	309	6	23	303	909
6	20	7	6	23	303	909
select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
a	b	c	a	b	c	d
1	21	123	1	21	909	12
1	21	101	1	21	909	12
1	21	104	1	21	909	12
1	33	988	1	21	909	12
1	19	107	1	21	909	12
1	21	500	1	21	909	12
1	21	345	1	21	909	12
7	11	708	7	13	312	406
7	11	8	7	13	312	406
8	33	404	8	64	248	107
8	33	123	8	64	248	107
8	33	114	8	64	248	107
8	33	9	8	64	248	107
6	20	214	6	20	315	279
6	20	315	6	20	315	279
6	20	309	6	20	315	279
6	20	7	6	20	315	279
1	21	123	1	19	203	107
1	21	101	1	19	203	107
1	21	104	1	19	203	107
1	33	988	1	19	203	107
1	19	107	1	19	203	107
1	21	500	1	19	203	107
1	21	345	1	19	203	107
8	33	404	8	80	800	314
8	33	123	8	80	800	314
8	33	114	8	80	800	314
8	33	9	8	80	800	314
6	20	214	6	23	303	909
6	20	315	6	23	303	909
6	20	309	6	23	303	909
6	20	7	6	23	303	909
explain select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	4	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v3_union as v,t2 where (v.a=t2.a) and (v.c>6);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 4,
      "filtered": 100,
      "attached_condition": "v.c > 6",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.a < 10 and t1.a + 1 > 6"
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.b > 10 and t1.c > 100 and t1.c > 6"
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union of selects without aggregation
# extracted conjunctive OR subformula: pushing in WHERE using equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
a	b	c	a	b	c	d
1	19	107	1	21	909	12
1	19	2	1	21	909	12
7	11	708	7	13	312	406
7	11	8	7	13	312	406
8	33	404	8	64	248	107
8	33	123	8	64	248	107
8	33	114	8	64	248	107
8	33	9	8	64	248	107
6	20	214	6	20	315	279
6	20	315	6	20	315	279
6	20	309	6	20	315	279
6	20	7	6	20	315	279
1	19	107	1	19	203	107
1	19	2	1	19	203	107
8	33	404	8	80	800	314
8	33	123	8	80	800	314
8	33	114	8	80	800	314
8	33	9	8	80	800	314
6	20	214	6	23	303	909
6	20	315	6	23	303	909
6	20	309	6	23	303	909
6	20	7	6	23	303	909
select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
a	b	c	a	b	c	d
1	19	107	1	21	909	12
1	19	2	1	21	909	12
7	11	708	7	13	312	406
7	11	8	7	13	312	406
8	33	404	8	64	248	107
8	33	123	8	64	248	107
8	33	114	8	64	248	107
8	33	9	8	64	248	107
6	20	214	6	20	315	279
6	20	315	6	20	315	279
6	20	309	6	20	315	279
6	20	7	6	20	315	279
1	19	107	1	19	203	107
1	19	2	1	19	203	107
8	33	404	8	80	800	314
8	33	123	8	80	800	314
8	33	114	8	80	800	314
8	33	9	8	80	800	314
6	20	214	6	23	303	909
6	20	315	6	23	303	909
6	20	309	6	23	303	909
6	20	7	6	23	303	909
explain select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	4	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v3_union as v,t2 where (v.a=t2.a) and ((t2.a>1) or (v.b<20));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 4,
      "filtered": 100,
      "attached_condition": "t2.a > 1 or v.b < 20",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.a < 10 and (t1.a > 1 or t1.b < 20)"
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.b > 10 and t1.c > 100 and (t1.a > 1 or t1.b < 20)"
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union of selects without aggregation
# extracted the whole condition: in WHERE of both selects
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v3_union as v,t2 where 
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
a	b	c	a	b	c	d
1	19	2	1	21	909	12
1	21	2	1	21	909	12
1	19	2	1	19	203	107
1	21	2	1	19	203	107
select * from v3_union as v,t2 where 
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
a	b	c	a	b	c	d
1	19	2	1	21	909	12
1	21	2	1	21	909	12
1	19	2	1	19	203	107
1	21	2	1	19	203	107
explain select * from v3_union as v,t2 where 
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	4	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v3_union as v,t2 where 
(v.a=t2.a) and ((v.b=19) or (v.b=21)) and ((v.c<3) or (v.c>600));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 4,
      "filtered": 100,
      "attached_condition": "(v.b = 19 or v.b = 21) and (v.c < 3 or v.c > 600)",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.a < 10 and (t1.b = 19 or t1.b = 21) and (t1.a + 1 < 3 or t1.a + 1 > 600)"
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.b > 10 and t1.c > 100 and (t1.b = 19 or t1.b = 21) and (t1.c < 3 or t1.c > 600)"
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union of 
# a select without aggregation and a select with aggregation
# extracted conjunctive predicate: pushing in WHERE of both selects
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
a	b	c	a	b	c	d
1	19	207	1	21	909	12
7	11	808	7	13	312	406
7	11	608	7	13	312	406
1	19	207	1	19	203	107
select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
a	b	c	a	b	c	d
1	19	207	1	21	909	12
7	11	808	7	13	312	406
7	11	608	7	13	312	406
1	19	207	1	19	203	107
explain select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	4	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v4_union as v,t2 where (v.a=t2.a) and (v.b<20);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 4,
      "filtered": 100,
      "attached_condition": "v.b < 20",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a < 10 and t1.b < 20"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.b > 10 and t1.b < 20"
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using derived table with union of 
# a select without aggregation and a select with aggregation
# extracted subformula: pushing in WHERE of one select
# extracted subformula: pushing in HAVING of the other select
# extracted sub-subformula: pushing in WHERE of the other select
# using an equality in all pushdowns
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4_union as v,t2 where 
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
a	b	c	a	b	c	d
1	33	1088	1	21	909	12
1	21	600	1	21	909	12
1	33	888	1	21	909	12
7	11	808	7	13	312	406
7	11	608	7	13	312	406
8	33	504	8	64	248	107
1	33	1088	1	19	203	107
1	21	600	1	19	203	107
1	33	888	1	19	203	107
8	33	504	8	80	800	314
select * from v4_union as v,t2 where 
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
a	b	c	a	b	c	d
1	33	1088	1	21	909	12
1	21	600	1	21	909	12
1	33	888	1	21	909	12
7	11	808	7	13	312	406
7	11	608	7	13	312	406
8	33	504	8	64	248	107
1	33	1088	1	19	203	107
1	21	600	1	19	203	107
1	33	888	1	19	203	107
8	33	504	8	80	800	314
explain select * from v4_union as v,t2 where 
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.a	4	Using where
2	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	UNION	t1	ALL	NULL	NULL	NULL	NULL	20	Using where
NULL	UNION RESULT	<union2,3>	ALL	NULL	NULL	NULL	NULL	NULL	
explain format=json select * from v4_union as v,t2 where 
(v.a=t2.a) and ((t2.a<3) or (v.b<40)) and (v.c>500);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 4,
      "filtered": 100,
      "attached_condition": "(t2.a < 3 or v.b < 40) and v.c > 500",
      "materialized": {
        "query_block": {
          "union_result": {
            "table_name": "<union2,3>",
            "access_type": "ALL",
            "query_specifications": [
              {
                "query_block": {
                  "select_id": 2,
                  "having_condition": "c > 109 and c > 500",
                  "filesort": {
                    "sort_key": "t1.a, t1.b",
                    "temporary_table": {
                      "table": {
                        "table_name": "t1",
                        "access_type": "ALL",
                        "rows": 20,
                        "filtered": 100,
                        "attached_condition": "t1.a < 10 and (t1.a < 3 or t1.b < 40)"
                      }
                    }
                  }
                }
              },
              {
                "query_block": {
                  "select_id": 3,
                  "operation": "UNION",
                  "table": {
                    "table_name": "t1",
                    "access_type": "ALL",
                    "rows": 20,
                    "filtered": 100,
                    "attached_condition": "t1.b > 10 and (t1.a < 3 or t1.b < 40) and t1.c + 100 > 500"
                  }
                }
              }
            ]
          }
        }
      }
    }
  }
}
# using embedded derived table : pushing the same conditions
# using several derived tables : pushing in all tables
# conjunctive subformula : pushing into WHERE
# extracted and formula : pushing into WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1 where
(v4.a<13) and (v1.a>5) and (v1.b>12);
a	b	min_c	a	b	max_c	avg_c
1	19	107	6	20	315	279.3333
1	21	500	6	20	315	279.3333
5	16	207	6	20	315	279.3333
5	27	132	6	20	315	279.3333
6	20	315	6	20	315	279.3333
8	33	404	6	20	315	279.3333
1	19	107	8	33	404	213.6667
1	21	500	8	33	404	213.6667
5	16	207	8	33	404	213.6667
5	27	132	8	33	404	213.6667
6	20	315	8	33	404	213.6667
8	33	404	8	33	404	213.6667
select * from v4,v1 where
(v4.a<13) and (v1.a>5) and (v1.b>12);
a	b	min_c	a	b	max_c	avg_c
1	19	107	6	20	315	279.3333
1	21	500	6	20	315	279.3333
5	16	207	6	20	315	279.3333
5	27	132	6	20	315	279.3333
6	20	315	6	20	315	279.3333
8	33	404	6	20	315	279.3333
1	19	107	8	33	404	213.6667
1	21	500	8	33	404	213.6667
5	16	207	8	33	404	213.6667
5	27	132	8	33	404	213.6667
6	20	315	8	33	404	213.6667
8	33	404	8	33	404	213.6667
explain select * from v4,v1 where
(v4.a<13) and (v1.a>5) and (v1.b>12);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where
1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v1 where
(v4.a<13) and (v1.a>5) and (v1.b>12);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 20,
      "filtered": 100,
      "attached_condition": "v4.a < 13",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15 and v1.a < 13",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15 and t1.a < 13"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived4>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v1.a > 5 and v1.b > 12"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and t1.b > 12"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : nothing to push
# using several derived tables : pushing only in one table
# conjunctive subformula : pushing into WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
8	33	404	8	33	404	213.6667	8	64	248	107
8	33	404	8	33	404	213.6667	8	80	800	314
select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
8	33	404	8	33	404	213.6667	8	64	248	107
8	33	404	8	33	404	213.6667	8	80	800	314
explain select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key1	key1	5	test.t2.a	2	
1	PRIMARY	<derived4>	ref	key0	key0	5	test.t2.a	2	Using where
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a=v1.a) and (v1.b>30);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a is not null and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key1"],
      "key": "key1",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 2,
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.b > 30",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.b > 30"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing different conditions
# using several derived tables : pushing in all tables
# conjunctive subformula : pushing into WHERE using equalities
# extracted and formula : pushing into WHERE using equalities
# conjunctive subformula : pushing into HAVING
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	6	20	315	279.3333	6	20	315	279
6	20	315	6	20	315	279.3333	6	23	303	909
select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	6	20	315	279.3333	6	20	315	279
6	20	315	6	20	315	279.3333	6	23	303	909
explain select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key1	key1	5	test.t2.a	2	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	test.t2.a	2	Using where
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v1,t2 where
(v4.a=t2.a) and (v4.a>1) and (v4.a=v1.a) and (v4.min_c>100) and (v1.b<30);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.a > 1 and t2.a is not null and t2.a is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key1"],
      "key": "key1",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v4.min_c > 100",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "min_c > 100",
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15 and v1.a > 1",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15 and t1.a > 1"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["test.t2.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.b < 30",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 1 and t1.b < 30"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing different conditions
# using several derived tables : pushing in all tables
# extracted or formula : pushing into WHERE
# conjunctive subformula : pushing into HAVING
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v1,t2 where
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
1	19	107	1	21	500	234.6000	2	3	207	207
1	19	107	1	21	500	234.6000	1	21	909	12
1	19	107	1	21	500	234.6000	7	13	312	406
1	19	107	1	21	500	234.6000	8	64	248	107
1	19	107	1	21	500	234.6000	6	20	315	279
1	19	107	1	21	500	234.6000	1	19	203	107
1	19	107	1	21	500	234.6000	8	80	800	314
1	19	107	1	21	500	234.6000	3	12	231	190
1	19	107	1	21	500	234.6000	6	23	303	909
5	16	207	5	16	207	207.0000	2	3	207	207
5	16	207	5	16	207	207.0000	1	21	909	12
5	16	207	5	16	207	207.0000	7	13	312	406
5	16	207	5	16	207	207.0000	8	64	248	107
5	16	207	5	16	207	207.0000	6	20	315	279
5	16	207	5	16	207	207.0000	1	19	203	107
5	16	207	5	16	207	207.0000	8	80	800	314
5	16	207	5	16	207	207.0000	3	12	231	190
5	16	207	5	16	207	207.0000	6	23	303	909
5	27	132	5	16	207	207.0000	2	3	207	207
5	27	132	5	16	207	207.0000	1	21	909	12
5	27	132	5	16	207	207.0000	7	13	312	406
5	27	132	5	16	207	207.0000	8	64	248	107
5	27	132	5	16	207	207.0000	6	20	315	279
5	27	132	5	16	207	207.0000	1	19	203	107
5	27	132	5	16	207	207.0000	8	80	800	314
5	27	132	5	16	207	207.0000	3	12	231	190
5	27	132	5	16	207	207.0000	6	23	303	909
6	20	315	6	20	315	279.3333	2	3	207	207
6	20	315	6	20	315	279.3333	1	21	909	12
6	20	315	6	20	315	279.3333	7	13	312	406
6	20	315	6	20	315	279.3333	8	64	248	107
6	20	315	6	20	315	279.3333	6	20	315	279
6	20	315	6	20	315	279.3333	1	19	203	107
6	20	315	6	20	315	279.3333	8	80	800	314
6	20	315	6	20	315	279.3333	3	12	231	190
6	20	315	6	20	315	279.3333	6	23	303	909
8	33	404	8	33	404	213.6667	2	3	207	207
8	33	404	8	33	404	213.6667	1	21	909	12
8	33	404	8	33	404	213.6667	7	13	312	406
8	33	404	8	33	404	213.6667	8	64	248	107
8	33	404	8	33	404	213.6667	6	20	315	279
8	33	404	8	33	404	213.6667	1	19	203	107
8	33	404	8	33	404	213.6667	8	80	800	314
8	33	404	8	33	404	213.6667	3	12	231	190
8	33	404	8	33	404	213.6667	6	23	303	909
select * from v4,v1,t2 where
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
1	19	107	1	21	500	234.6000	2	3	207	207
1	19	107	1	21	500	234.6000	1	21	909	12
1	19	107	1	21	500	234.6000	7	13	312	406
1	19	107	1	21	500	234.6000	8	64	248	107
1	19	107	1	21	500	234.6000	6	20	315	279
1	19	107	1	21	500	234.6000	1	19	203	107
1	19	107	1	21	500	234.6000	8	80	800	314
1	19	107	1	21	500	234.6000	3	12	231	190
1	19	107	1	21	500	234.6000	6	23	303	909
5	16	207	5	16	207	207.0000	2	3	207	207
5	16	207	5	16	207	207.0000	1	21	909	12
5	16	207	5	16	207	207.0000	7	13	312	406
5	16	207	5	16	207	207.0000	8	64	248	107
5	16	207	5	16	207	207.0000	6	20	315	279
5	16	207	5	16	207	207.0000	1	19	203	107
5	16	207	5	16	207	207.0000	8	80	800	314
5	16	207	5	16	207	207.0000	3	12	231	190
5	16	207	5	16	207	207.0000	6	23	303	909
5	27	132	5	16	207	207.0000	2	3	207	207
5	27	132	5	16	207	207.0000	1	21	909	12
5	27	132	5	16	207	207.0000	7	13	312	406
5	27	132	5	16	207	207.0000	8	64	248	107
5	27	132	5	16	207	207.0000	6	20	315	279
5	27	132	5	16	207	207.0000	1	19	203	107
5	27	132	5	16	207	207.0000	8	80	800	314
5	27	132	5	16	207	207.0000	3	12	231	190
5	27	132	5	16	207	207.0000	6	23	303	909
6	20	315	6	20	315	279.3333	2	3	207	207
6	20	315	6	20	315	279.3333	1	21	909	12
6	20	315	6	20	315	279.3333	7	13	312	406
6	20	315	6	20	315	279.3333	8	64	248	107
6	20	315	6	20	315	279.3333	6	20	315	279
6	20	315	6	20	315	279.3333	1	19	203	107
6	20	315	6	20	315	279.3333	8	80	800	314
6	20	315	6	20	315	279.3333	3	12	231	190
6	20	315	6	20	315	279.3333	6	23	303	909
8	33	404	8	33	404	213.6667	2	3	207	207
8	33	404	8	33	404	213.6667	1	21	909	12
8	33	404	8	33	404	213.6667	7	13	312	406
8	33	404	8	33	404	213.6667	8	64	248	107
8	33	404	8	33	404	213.6667	6	20	315	279
8	33	404	8	33	404	213.6667	1	19	203	107
8	33	404	8	33	404	213.6667	8	80	800	314
8	33	404	8	33	404	213.6667	3	12	231	190
8	33	404	8	33	404	213.6667	6	23	303	909
explain select * from v4,v1,t2 where
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using join buffer (flat, BNL join)
1	PRIMARY	<derived4>	ref	key0	key0	5	v4.a	2	Using where
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v1,t2 where
(((v4.b>10) and (v4.a>1)) or (v4.b<20)) and (v1.max_c>200) and (v1.a=v4.a);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived2>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100,
        "attached_condition": "v4.b > 10 and v4.a > 1 or v4.b < 20"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "attached_condition": "(v4.b > 10 and v4.a > 1 or v4.b < 20) and v4.a is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15 and (v1.b > 10 and v1.a > 1 or v1.b < 20)",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15 and (t1.b > 10 and t1.a > 1 or t1.b < 20)"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["a"],
      "ref": ["v4.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.max_c > 200",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707 and max_c > 200",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing different conditions
# using several derived tables : pushing only in one table
# extracted or formula : pushing into WHERE
# extracted or formula : pushing into HAVING
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
a	b	min_c	a	b	max_c	avg_c
select * from v4,v2 where
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
a	b	min_c	a	b	max_c	avg_c
explain select * from v4,v2 where
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where
1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v2 where
((v4.a>12) and (v4.min_c<300) and (v4.b>13)) or (v4.a<1);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 20,
      "filtered": 100,
      "attached_condition": "v4.a > 12 and v4.min_c < 300 and v4.b > 13 or v4.a < 1",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "v1.a > 12 and min_c < 300 and v1.b > 13 or v1.a < 1",
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15 and (v1.a > 12 and v1.b > 13 or v1.a < 1)",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15 and (t1.a > 12 and t1.b > 13 or t1.a < 1)"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived4>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing different conditions
# using several derived tables : pushing only in one table
# conjunctive subformula : pushing into WHERE
# conjunctive subformula : pushing into HAVING
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
a	b	min_c	a	b	max_c	avg_c
select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
a	b	min_c	a	b	max_c	avg_c
explain select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	v4.a	2	
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v4.min_c<100);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 20,
      "filtered": 100,
      "attached_condition": "v4.b = v4.a and v4.min_c < 100 and v4.a is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "min_c < 100",
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.b = v1.a and v1.a < 15",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.b = t1.a and t1.a < 15"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["v4.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing the same conditions
# using several derived tables : pushing in all tables
# extracted and formula : pushing into WHERE using equalities
# conjunctive subformula : pushing into WHERE
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
a	b	min_c	a	b	max_c	avg_c
select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
a	b	min_c	a	b	max_c	avg_c
explain select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	v4.a	2	
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and (v2.b<30);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 20,
      "filtered": 100,
      "attached_condition": "v4.b = v4.a and v4.a < 30 and v4.a is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.b = v1.a and v1.a < 15 and v1.a < 30",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.b = t1.a and t1.a < 15 and t1.a < 30"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["v4.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and t1.b < 30"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing the same conditions
# using several derived tables : pushing in all tables
# extracted or formula : pushing into WHERE using equalities
# extracted and formula : pushing into WHERE using equalities
# pushing equalities
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
a	b	min_c	a	b	max_c	avg_c
select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
a	b	min_c	a	b	max_c	avg_c
explain select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	v4.a	2	
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v2 where
(v4.a=v2.b) and (v4.a=v4.b) and ((v2.b<30) or (v4.a>2));
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 20,
      "filtered": 100,
      "attached_condition": "v4.b = v4.a and (v4.a < 30 or v4.a > 2) and v4.a is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.b = v1.a and v1.a < 15 and (v1.a < 30 or v1.a > 2)",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.b = t1.a and t1.a < 15 and (t1.a < 30 or t1.a > 2)"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["v4.a"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5 and (t1.b < 30 or t1.b > 2)"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing the same conditions
# using several derived tables : pushing in all tables
# extracted or formula : pushing into WHERE
# conjunctive subformula : pushing into WHERE
# pushing equalities    
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2 where
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
(v4.min_c=v2.max_c) and (v4.min_c>100);
a	b	min_c	a	b	max_c	avg_c
6	20	315	6	20	315	279.3333
8	33	404	8	33	404	213.6667
select * from v4,v2 where
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
(v4.min_c=v2.max_c) and (v4.min_c>100);
a	b	min_c	a	b	max_c	avg_c
6	20	315	6	20	315	279.3333
8	33	404	8	33	404	213.6667
explain select * from v4,v2 where
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
(v4.min_c=v2.max_c) and (v4.min_c>100);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	<derived2>	ALL	NULL	NULL	NULL	NULL	20	Using where
1	PRIMARY	<derived4>	ref	key0	key0	5	v4.min_c	2	
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v2 where
(((v4.a<12) and (v4.b>13)) or (v4.a>10)) and
(v4.min_c=v2.max_c) and (v4.min_c>100);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 20,
      "filtered": 100,
      "attached_condition": "(v4.a < 12 and v4.b > 13 or v4.a > 10) and v4.min_c > 100 and v4.min_c is not null",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "min_c > 100",
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15 and (v1.a < 12 and v1.b > 13 or v1.a > 10)",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15 and (t1.a < 12 and t1.b > 13 or t1.a > 10)"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "table": {
      "table_name": "<derived4>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["max_c"],
      "ref": ["v4.min_c"],
      "rows": 2,
      "filtered": 100,
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707 and max_c > 100",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
# using embedded view : pushing the same conditions
# using several derived tables : pushing only in one table
# extracted or formula : pushing into WHERE
set statement optimizer_switch='condition_pushdown_for_derived=off' for select * from v4,v2,t2 where
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
(v4.min_c=t2.c) and (t2.c>100);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	6	20	315	279.3333	6	20	315	279
6	20	315	8	33	404	213.6667	6	20	315	279
select * from v4,v2,t2 where
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
(v4.min_c=t2.c) and (t2.c>100);
a	b	min_c	a	b	max_c	avg_c	a	b	c	d
6	20	315	6	20	315	279.3333	6	20	315	279
6	20	315	8	33	404	213.6667	6	20	315	279
explain select * from v4,v2,t2 where
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
(v4.min_c=t2.c) and (t2.c>100);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	9	Using where
1	PRIMARY	<derived2>	ref	key0	key0	5	test.t2.c	2	Using where
1	PRIMARY	<derived4>	ALL	NULL	NULL	NULL	NULL	20	Using join buffer (flat, BNL join)
4	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
2	DERIVED	<derived3>	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	20	Using where; Using temporary; Using filesort
explain format=json select * from v4,v2,t2 where
(((v4.a<12) and (t2.b>13)) or (v4.a>10)) and
(v4.min_c=t2.c) and (t2.c>100);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 9,
      "filtered": 100,
      "attached_condition": "t2.c > 100 and t2.c is not null"
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["min_c"],
      "ref": ["test.t2.c"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v4.a < 12 and t2.b > 13 or v4.a > 10",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "having_condition": "min_c > 100",
          "filesort": {
            "sort_key": "v1.a, v1.b",
            "temporary_table": {
              "table": {
                "table_name": "<derived3>",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "v1.a < 15 and (v1.a < 12 or v1.a > 10)",
                "materialized": {
                  "query_block": {
                    "select_id": 3,
                    "having_condition": "max_c < 707",
                    "filesort": {
                      "sort_key": "t1.a, t1.b",
                      "temporary_table": {
                        "table": {
                          "table_name": "t1",
                          "access_type": "ALL",
                          "rows": 20,
                          "filtered": 100,
                          "attached_condition": "t1.a < 15 and (t1.a < 12 or t1.a > 10)"
                        }
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived4>",
        "access_type": "ALL",
        "rows": 20,
        "filtered": 100
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "having_condition": "max_c < 707",
          "filesort": {
            "sort_key": "t1.a, t1.b",
            "temporary_table": {
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 20,
                "filtered": 100,
                "attached_condition": "t1.a > 5"
              }
            }
          }
        }
      }
    }
  }
}
drop view v1,v2,v3,v4;
drop view v_union,v2_union,v3_union,v4_union;
drop view v_double,v_char,v_decimal;
drop table t1,t2,t1_double,t2_double,t1_char,t2_char,t1_decimal,t2_decimal;
#
# MDEV-10782: condition extracted from a multiple equality
#             pushed into HAVING
#
CREATE TABLE t1 (i int);
INSERT INTO t1 VALUES (1),(2);
EXPLAIN EXTENDED
SELECT *
FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2
WHERE f = 8;
id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
1	PRIMARY	<derived3>	ALL	NULL	NULL	NULL	NULL	2	100.00	Using where
3	DERIVED	t1	ALL	NULL	NULL	NULL	NULL	2	100.00	
Warnings:
Note	1003	/* select#1 */ select `sq1`.`f` AS `f` from (/* select#3 */ select min(`test`.`t1`.`i`) AS `f` from `test`.`t1` having `f` = 8) `sq1` where `sq1`.`f` = 8
SELECT *
FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2
WHERE f = 8;
f
SELECT *
FROM ( SELECT * FROM ( SELECT MIN(i) as f FROM t1 ) sq1 ) AS sq2
WHERE f = 1;
f
1
DROP TABLE t1;
#
# MDEV-10783: pushdown into constant view
#
CREATE TABLE t1 (i int) ENGINE=MyISAM;
CREATE VIEW v AS SELECT 5;
SELECT * FROM t1 WHERE 1 IN ( SELECT * FROM v );
i
DROP VIEW v;
DROP TABLE t1;
#
# MDEV-10785: second execution of a query with condition
#             pushed into view
#
CREATE TABLE t1 (i int);
CREATE VIEW v1 AS SELECT i FROM t1 WHERE i < 5;
CREATE FUNCTION f (in1 int) RETURNS int RETURN in1;
CREATE VIEW v2 AS SELECT * FROM v1 GROUP BY i;
PREPARE stmt FROM "SELECT * FROM v2 WHERE f(0) <> 2";
EXECUTE stmt;
i
EXECUTE stmt;
i
DROP FUNCTION f;
DROP VIEW v2,v1;
DROP TABLE t1;
#
# MDEV-10884: condition pushdown into derived specified by
#             1. unit with  SELECT containing ORDER BY ... LIMIT
#             2. unit containing global ORDER BY ... LIMIT
#
create table t1(a int);
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
select a from t1 order by a limit 5;
a
0
1
2
3
4
set statement optimizer_switch='condition_pushdown_for_derived=off' for
select * from (select a from t1 order by a limit 5) t where t.a not in (1,2,3);
a
0
4
set statement optimizer_switch='condition_pushdown_for_derived=on' for 
select * from (select a from t1 order by a limit 5) t where t.a not in (1,2,3);
a
0
4
select a from t1 where a < 4 union select a from t1 where a > 5
order by a limit 5;
a
0
1
2
3
6
set statement optimizer_switch='condition_pushdown_for_derived=off' for
select * from 
(select a from t1 where a < 4 union select a from t1 where a > 5
order by a limit 5) t where t.a not in (2,9);
a
0
1
3
6
set statement optimizer_switch='condition_pushdown_for_derived=on' for 
select * from 
(select a from t1 where a < 4 union select a from t1 where a > 5
order by a limit 5) t where t.a not in (2,9);
a
0
1
3
6
drop table t1;
#
# MDEV-11072: pushdown of the condition obtained
#             after constant row substitution
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
CREATE OR REPLACE VIEW v2 AS SELECT * FROM t2;
CREATE TABLE t3 (c INT) ENGINE=MyISAM;
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v3 AS SELECT * FROM t3;
SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT c FROM v3 WHERE c = a 
) 
);
a
INSERT INTO t1 VALUES (2);
INSERT INTO t2 VALUES (3), (2);
INSERT INTO t3 VALUES (4), (1), (2), (7);
SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT c FROM v3 WHERE c = a 
) 
);
a
2
EXPLAIN FORMAT=JSON
SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT c FROM v3 WHERE c = a 
) 
);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "const_condition": "0 or <in_optimizer>(2,<exists>(subquery#3))",
    "table": {
      "table_name": "t1",
      "access_type": "system",
      "rows": 1,
      "filtered": 100
    },
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "t2.b = 2",
      "first_match": "t1"
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "<derived5>",
            "access_type": "index_subquery",
            "possible_keys": ["key0"],
            "key": "key0",
            "key_length": "5",
            "used_key_parts": ["c"],
            "ref": ["func"],
            "rows": 2,
            "filtered": 100,
            "materialized": {
              "query_block": {
                "select_id": 5,
                "table": {
                  "table_name": "t3",
                  "access_type": "ALL",
                  "rows": 4,
                  "filtered": 100,
                  "attached_condition": "t3.c = 2"
                }
              }
            }
          }
        }
      }
    ]
  }
}
CREATE TABLE t4 (d INT, e INT) ENGINE=MyISAM;
INSERT INTO t4 VALUES (1,10),(3,11),(2,10),(2,20),(3,21);
CREATE OR REPLACE VIEW v4 AS 
SELECT d, sum(e) AS s FROM t4 GROUP BY d;
set statement optimizer_switch='condition_pushdown_for_derived=off' for SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT d FROM v4 WHERE s > a 
) 
);
a
2
SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT d FROM v4 WHERE s > a 
) 
);
a
2
explain SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT d FROM v4 WHERE s > a 
) 
);
id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
1	PRIMARY	t1	system	NULL	NULL	NULL	NULL	1	
1	PRIMARY	t2	ALL	NULL	NULL	NULL	NULL	2	Using where; FirstMatch(t1)
3	DEPENDENT SUBQUERY	<derived5>	index_subquery	key0	key0	5	func	2	Using where
5	DERIVED	t4	ALL	NULL	NULL	NULL	NULL	5	Using temporary; Using filesort
explain format=json SELECT * FROM t1 WHERE a IN ( 
SELECT b FROM v2 WHERE b < a OR b IN ( 
SELECT d FROM v4 WHERE s > a 
) 
);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "const_condition": "0 or <in_optimizer>(2,<exists>(subquery#3))",
    "table": {
      "table_name": "t1",
      "access_type": "system",
      "rows": 1,
      "filtered": 100
    },
    "table": {
      "table_name": "t2",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "t2.b = 2",
      "first_match": "t1"
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "<derived5>",
            "access_type": "index_subquery",
            "possible_keys": ["key0"],
            "key": "key0",
            "key_length": "5",
            "used_key_parts": ["d"],
            "ref": ["func"],
            "rows": 2,
            "filtered": 100,
            "materialized": {
              "query_block": {
                "select_id": 5,
                "filesort": {
                  "sort_key": "t4.d",
                  "temporary_table": {
                    "table": {
                      "table_name": "t4",
                      "access_type": "ALL",
                      "rows": 5,
                      "filtered": 100
                    }
                  }
                }
              }
            }
          }
        }
      }
    ]
  }
}
DROP VIEW v2,v3,v4;
DROP TABLE t1,t2,t3,t4;
#
# MDEV-10800: pushdown of the condition obtained
#             after constant row substitution
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3),(4);
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
SELECT * FROM 
( SELECT * FROM t1
WHERE EXISTS ( SELECT * FROM v2 WHERE b = a ) ) AS sq;
a
EXPLAIN FORMAT=JSON
SELECT * FROM 
( SELECT * FROM t1
WHERE EXISTS ( SELECT * FROM v2 WHERE b = a ) ) AS sq;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "const_condition": "<in_optimizer>(1,exists(subquery#3))",
    "table": {
      "table_name": "t1",
      "access_type": "system",
      "rows": 1,
      "filtered": 100
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "<derived4>",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "v2.b = 1",
            "materialized": {
              "query_block": {
                "select_id": 4,
                "table": {
                  "table_name": "t2",
                  "access_type": "ALL",
                  "rows": 2,
                  "filtered": 100,
                  "attached_condition": "t2.b = 1"
                }
              }
            }
          }
        }
      }
    ]
  }
}
DROP VIEW v2;
DROP TABLE t1,t2;
#
# MDEV-11102: condition pushdown into materialized inner table 
#              of outer join is not applied as not being valid 
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (0),(2);
CREATE TABLE t2 (b INT);
INSERT INTO t2 VALUES (1),(2);
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
SELECT * FROM t1 LEFT JOIN t2 ON a = b WHERE b IS NULL;
a	b
0	NULL
SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;
a	b
0	NULL
EXPLAIN FORMAT=JSON
SELECT * FROM t1 LEFT JOIN v2 ON a = b WHERE b IS NULL;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t1",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ref",
      "possible_keys": ["key0"],
      "key": "key0",
      "key_length": "5",
      "used_key_parts": ["b"],
      "ref": ["test.t1.a"],
      "rows": 2,
      "filtered": 100,
      "attached_condition": "trigcond(v2.b is null) and trigcond(trigcond(t1.a is not null))",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t2",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100
          }
        }
      }
    }
  }
}
DROP VIEW v2;
DROP TABLE t1,t2;
#
# MDEV-11103: pushdown condition with ANY subquery
#
CREATE TABLE t1 (i INT);
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
INSERT INTO t1 VALUES (1),(2);
EXPLAIN FORMAT=JSON
SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived3>",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "<nop>(v1.i <= 3)",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "<nop>(t1.i <= 3)"
          }
        }
      }
    }
  }
}
Warnings:
Note	1249	Select 2 was reduced during optimization
SELECT * FROM v1 WHERE i <= ANY ( SELECT 3 );
i
1
2
DROP VIEW v1;
DROP TABLE t1;
#
# MDEV-11315: condition with outer reference to mergeable derived
#
CREATE TABLE t1 (pk1 INT PRIMARY KEY, a INT, b INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (10,7,1),(11,0,2);
CREATE TABLE t2 (pk2 INT PRIMARY KEY, c INT, d DATETIME) ENGINE=MyISAM;
INSERT INTO t2 VALUES 
(1,4,'2008-09-27 00:34:58'),
(2,5,'2007-05-28 00:00:00'),
(3,6,'2009-07-25 09:21:20');
CREATE VIEW v1 AS SELECT * FROM t1;
CREATE ALGORITHM=TEMPTABLE VIEW v2 AS SELECT * FROM t2;
SELECT * FROM v1 AS sq 
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
pk1	a	b
10	7	1
11	0	2
EXPLAIN FORMAT=JSON
SELECT * FROM v1 AS sq 
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t1",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "<in_optimizer>(t1.b,<exists>(subquery#2)) or t1.b = 100"
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "<derived4>",
            "access_type": "index_subquery",
            "possible_keys": ["key0"],
            "key": "key0",
            "key_length": "4",
            "used_key_parts": ["pk2"],
            "ref": ["func"],
            "rows": 2,
            "filtered": 100,
            "materialized": {
              "query_block": {
                "select_id": 4,
                "table": {
                  "table_name": "t2",
                  "access_type": "ALL",
                  "rows": 3,
                  "filtered": 100
                }
              }
            }
          }
        }
      }
    ]
  }
}
SELECT * FROM ( SELECT * FROM t1 ) AS sq 
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
pk1	a	b
10	7	1
11	0	2
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT * FROM t1 ) AS sq 
WHERE b IN ( SELECT pk2 FROM v2 WHERE c > sq.b ) OR b = 100;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t1",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "<in_optimizer>(t1.b,<exists>(subquery#3)) or t1.b = 100"
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "<derived4>",
            "access_type": "index_subquery",
            "possible_keys": ["key0"],
            "key": "key0",
            "key_length": "4",
            "used_key_parts": ["pk2"],
            "ref": ["func"],
            "rows": 2,
            "filtered": 100,
            "materialized": {
              "query_block": {
                "select_id": 4,
                "table": {
                  "table_name": "t2",
                  "access_type": "ALL",
                  "rows": 3,
                  "filtered": 100
                }
              }
            }
          }
        }
      }
    ]
  }
}
DROP VIEW v1,v2;
DROP TABLE t1,t2;
#
# MDEV-11313: pushdown of the condition obtained
#             after constant row substitution
#
CREATE TABLE t1 (a INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(2);
CREATE TABLE t2 (b INT) ENGINE=MyISAM;
INSERT INTO t2 VALUES (50);
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
SELECT ( SELECT COUNT(*) FROM v1 WHERE a = t2.b ) AS f FROM t2 GROUP BY f;
f
0
EXPLAIN FORMAT=JSON
SELECT ( SELECT COUNT(*) FROM v1 WHERE a = t2.b ) AS f FROM t2 GROUP BY f;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "system",
      "rows": 1,
      "filtered": 100
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "<derived3>",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "v1.a = 50",
            "materialized": {
              "query_block": {
                "select_id": 3,
                "table": {
                  "table_name": "t1",
                  "access_type": "ALL",
                  "rows": 2,
                  "filtered": 100,
                  "attached_condition": "t1.a = 50"
                }
              }
            }
          }
        }
      }
    ]
  }
}
CREATE TABLE t3 (a INT, b INT) ENGINE=MYISAM;
INSERT INTO t3 VALUES (1,10),(3,11),(2,10),(2,20),(3,21);
CREATE VIEW v2 AS SELECT a, sum(b) AS s FROM t3 GROUP BY a ;
SELECT ( SELECT COUNT(*) FROM v2 WHERE s < t2.b ) AS f FROM t2 GROUP BY f;
f
3
EXPLAIN FORMAT=JSON
SELECT ( SELECT COUNT(*) FROM v2 WHERE s < t2.b ) AS f FROM t2 GROUP BY f;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "t2",
      "access_type": "system",
      "rows": 1,
      "filtered": 100
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "<derived3>",
            "access_type": "ALL",
            "rows": 5,
            "filtered": 100,
            "attached_condition": "v2.s < 50",
            "materialized": {
              "query_block": {
                "select_id": 3,
                "filesort": {
                  "sort_key": "t3.a",
                  "temporary_table": {
                    "table": {
                      "table_name": "t3",
                      "access_type": "ALL",
                      "rows": 5,
                      "filtered": 100
                    }
                  }
                }
              }
            }
          }
        }
      }
    ]
  }
}
DROP VIEW v1,v2;
DROP TABLE t1,t2,t3;
#
# MDEV-10882: pushdown of the predicate with cached value
#
CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL) ENGINE=MyISAM;
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
INSERT INTO t1 VALUES (1,2),(3,4);
CREATE TABLE t2 (c INT NOT NULL) ENGINE=MyISAM;
INSERT INTO t2 VALUES (5),(6);
SELECT a, GROUP_CONCAT(b) FROM v1
WHERE b IN ( SELECT COUNT(c) FROM t2 ) GROUP BY a;
a	GROUP_CONCAT(b)
1	2
EXPLAIN FORMAT=JSON
SELECT a, GROUP_CONCAT(b) FROM v1
WHERE b IN ( SELECT COUNT(c) FROM t2 ) GROUP BY a;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery2>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 2,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "read_sorted_file": {
      "filesort": {
        "sort_key": "v1.a",
        "table": {
          "table_name": "<derived3>",
          "access_type": "ALL",
          "rows": 2,
          "filtered": 100,
          "attached_condition": "v1.b = 2",
          "materialized": {
            "query_block": {
              "select_id": 3,
              "table": {
                "table_name": "t1",
                "access_type": "ALL",
                "rows": 2,
                "filtered": 100,
                "attached_condition": "t1.b = 2"
              }
            }
          }
        }
      }
    }
  }
}
DROP VIEW v1;
DROP TABLE t1,t2;
#
# MDEV-10836: pushdown of the predicate with cached value
#
CREATE TABLE t (pk INT PRIMARY KEY, f INT) ENGINE=MyISAM;
CREATE ALGORITHM=TEMPTABLE VIEW v AS SELECT * FROM t;
INSERT INTO t VALUES (1,1),(3,2);
SELECT * FROM v AS v1, v AS v2
WHERE v2.pk > v1.f AND v1.f IN ( SELECT COUNT(pk) FROM t );
pk	f	pk	f
3	2	3	2
EXPLAIN FORMAT=JSON
SELECT * FROM v AS v1, v AS v2
WHERE v2.pk > v1.f AND v1.f IN ( SELECT COUNT(pk) FROM t );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery2>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 2,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.f = 2",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "t",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "t.f = 2"
          }
        }
      }
    },
    "block-nl-join": {
      "table": {
        "table_name": "<derived4>",
        "access_type": "ALL",
        "rows": 2,
        "filtered": 100,
        "attached_condition": "v2.pk > 2"
      },
      "buffer_type": "flat",
      "buffer_size": "256Kb",
      "join_type": "BNL",
      "materialized": {
        "query_block": {
          "select_id": 4,
          "table": {
            "table_name": "t",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100
          }
        }
      }
    }
  }
}
DROP VIEW v;
DROP TABLE t;
#
# MDEV-11488: pushdown of the predicate with cached value
#
CREATE TABLE t1 (i INT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1),(3),(2);
CREATE TABLE t2 (j INT, KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3),(4);
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
3
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 3",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = 3"
          }
        }
      }
    }
  }
}
UPDATE t2 SET j = 2 WHERE j = 3;
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
2
DROP TABLE t1,t2;
CREATE TABLE t1 (i FLOAT) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1.5),(3.2),(2.71);
CREATE TABLE t2 (j FLOAT, KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3.2),(2.71);
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
2.71
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 2.7100000381469727",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = 2.7100000381469727"
          }
        }
      }
    }
  }
}
DROP TABLE t1,t2;
CREATE TABLE t1 (i DECIMAL(10,2)) ENGINE=MyISAM;
INSERT INTO t1 VALUES (1.5),(3.21),(2.47);
CREATE TABLE t2 (j DECIMAL(10,2), KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES (3.21),(4.55);
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
3.21
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 3.21",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = 3.21"
          }
        }
      }
    }
  }
}
DROP TABLE t1,t2;
CREATE TABLE t1 (i VARCHAR(32)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('cc'),('aa'),('ddd');
CREATE TABLE t2 (j VARCHAR(16), KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('bbb'),('aa');
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
aa
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 'aa'",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = 'aa'"
          }
        }
      }
    }
  }
}
DROP TABLE t1,t2;
CREATE TABLE t1 (i DATETIME) ENGINE=MyISAM;
INSERT INTO t1 VALUES
('2008-09-27 00:34:58'),('2007-05-28 00:00:00'), ('2009-07-25 09:21:20');
CREATE TABLE t2 (j DATETIME, KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES
('2007-05-28 00:00:00'), ('2010-08-25 00:00:00');
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
2007-05-28 00:00:00
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 2007-05-28 00:00:00",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = TIMESTAMP'2007-05-28 00:00:00'"
          }
        }
      }
    }
  }
}
DROP TABLE t1,t2;
CREATE TABLE t1 (i DATE) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('2008-09-27'),('2007-05-28'), ('2009-07-25');
CREATE TABLE t2 (j DATE, KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('2007-05-28'), ('2010-08-25');
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
2007-05-28
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 2007-05-28",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = TIMESTAMP'2007-05-28 00:00:00'"
          }
        }
      }
    }
  }
}
DROP TABLE t1,t2;
CREATE TABLE t1 (i TIME) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('00:34:58'),('10:00:02'), ('09:21:20');
CREATE TABLE t2 (j TIME, KEY(j)) ENGINE=MyISAM;
INSERT INTO t2 VALUES ('10:00:02'), ('11:00:10');
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
i
10:00:02
EXPLAIN FORMAT=JSON
SELECT * FROM ( SELECT DISTINCT * FROM t1 ) AS sq
WHERE i IN ( SELECT MIN(j) FROM t2 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery3>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 3,
          "table": {
            "message": "Select tables optimized away"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 3,
      "filtered": 100,
      "attached_condition": "sq.i = 10:00:02",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 3,
            "filtered": 100,
            "attached_condition": "t1.i = TIME'10:00:02'"
          }
        }
      }
    }
  }
}
DROP TABLE t1,t2;
#
# MDEV-11593: pushdown of condition with NULLIF
#
CREATE TABLE t1 (i INT);
CREATE OR REPLACE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
INSERT INTO t1 VALUES (2), (1);
SELECT * FROM v1 WHERE NULLIF(1, i);
i
2
EXPLAIN FORMAT=JSON
SELECT * FROM v1 WHERE NULLIF(1, i);
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived2>",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "nullif(1,v1.i)",
      "materialized": {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "nullif(1,t1.i)"
          }
        }
      }
    }
  }
}
DROP VIEW v1;
DROP TABLE t1;
#
# MDEV-11608: pushdown of the predicate with cached null value
#
CREATE TABLE t1 (c VARCHAR(3));
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
INSERT INTO t1 VALUES ('foo'),('bar');
CREATE TABLE t2 (c VARCHAR(3));
INSERT INTO t2 VALUES ('foo'),('xyz');
SELECT * FROM v1 WHERE v1.c IN ( SELECT MIN(c) FROM t2 WHERE 0 );
c
EXPLAIN FORMAT=JSON
SELECT * FROM v1 WHERE v1.c IN ( SELECT MIN(c) FROM t2 WHERE 0 );
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<subquery2>",
      "access_type": "system",
      "rows": 1,
      "filtered": 100,
      "materialized": {
        "unique": 1,
        "query_block": {
          "select_id": 2,
          "table": {
            "message": "Impossible WHERE"
          }
        }
      }
    },
    "table": {
      "table_name": "<derived3>",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.c = NULL",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "t1.c = NULL"
          }
        }
      }
    }
  }
}
DROP VIEW v1;
DROP TABLE t1,t2;
CREATE TABLE t1 (d DECIMAL(10,2));
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
INSERT INTO t1 VALUES (5.37),(1.1);
CREATE TABLE t2 (d DECIMAL(10,2));
INSERT INTO t2 VALUES ('1.1'),('2.23');
SELECT * FROM v1 WHERE v1.d IN ( SELECT MIN(d) FROM t2 WHERE 0 );
d
DROP VIEW v1;
DROP TABLE t1,t2;
#
# MDEV-11820: second execution of PS for query 
#             with false subquery predicate in WHERE 
#
CREATE TABLE t1 (c VARCHAR(3)) ENGINE=MyISAM;
INSERT INTO t1 VALUES ('foo'),('bar');
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
CREATE TABLE t2 (a INT);
INSERT INTO t2 VALUES (3), (4);
PREPARE stmt1 FROM 
" SELECT * FROM v1 WHERE 1 IN (SELECT a FROM t2) OR c = 'foo'";
PREPARE stmt2 FROM 
"EXPLAIN FORMAT=JSON 
 SELECT * FROM v1 WHERE 1 IN (SELECT a FROM t2) OR c = 'foo'";
EXECUTE stmt1;
c
foo
EXECUTE stmt2;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived3>",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "v1.c = 'foo'",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "t1.c = 'foo'"
          }
        }
      }
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t2",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100,
            "attached_condition": "1 = t2.a"
          }
        }
      }
    ]
  }
}
INSERT INTO t2 SELECT a+1 FROM t2;
INSERT INTO t2 SELECT a+1 FROM t2;
INSERT INTO t2 SELECT a+1 FROM t2;
INSERT INTO t2 SELECT a+1 FROM t2;
INSERT INTO t2 SELECT a+1 FROM t2;
INSERT INTO t2 SELECT a+1 FROM t2;
EXECUTE stmt1;
c
foo
EXECUTE stmt2;
EXPLAIN
{
  "query_block": {
    "select_id": 1,
    "table": {
      "table_name": "<derived3>",
      "access_type": "ALL",
      "rows": 2,
      "filtered": 100,
      "attached_condition": "<in_optimizer>(1,<exists>(subquery#2)) or v1.c = 'foo'",
      "materialized": {
        "query_block": {
          "select_id": 3,
          "table": {
            "table_name": "t1",
            "access_type": "ALL",
            "rows": 2,
            "filtered": 100
          }
        }
      }
    },
    "subqueries": [
      {
        "query_block": {
          "select_id": 2,
          "table": {
            "table_name": "t2",
            "access_type": "ALL",
            "rows": 128,
            "filtered": 100,
            "attached_condition": "1 = t2.a"
          }
        }
      }
    ]
  }
}
DEALLOCATE PREPARE stmt1;
DEALLOCATE PREPARE stmt2;
DROP VIEW v1;
DROP TABLE t1,t2;