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MDEV-18880: Optimizer trace prints date in hexadecimal
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Introduced a print_key_value function to makes sure that the trace prints data in readable format
for readable characters and the rest of the characters are printed as hexadecimal.
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Varun committed Jun 11, 2019
1 parent 40ff801 commit a0cb755
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Showing 9 changed files with 501 additions and 31 deletions.
298 changes: 292 additions & 6 deletions mysql-test/main/opt_trace.result
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Expand Up @@ -1446,7 +1446,7 @@ EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=20010104e0 GROUP BY id {
{
"index": "id",
"covering": true,
"ranges": ["(0x24a20f) <= (a)"],
"ranges": ["(2001-01-04) <= (a)"],
"rows": 9,
"cost": 2.35
}
Expand All @@ -1462,7 +1462,7 @@ EXPLAIN SELECT id,MIN(a),MAX(a) FROM t1 WHERE a>=20010104e0 GROUP BY id {
"rows": 9,
"cost": 2.35,
"key_parts_used_for_access": ["id"],
"ranges": ["(0x24a20f) <= (a)"],
"ranges": ["(2001-01-04) <= (a)"],
"chosen": false,
"cause": "cost"
},
Expand Down Expand Up @@ -1624,7 +1624,7 @@ EXPLAIN SELECT * FROM t1 WHERE a = 20010104e0 GROUP BY id {
{
"index": "id",
"covering": true,
"ranges": ["(0x24a20f) <= (a) <= (0x24a20f)"],
"ranges": ["(2001-01-04) <= (a) <= (2001-01-04)"],
"rows": 9,
"cost": 2.35
}
Expand All @@ -1640,7 +1640,7 @@ EXPLAIN SELECT * FROM t1 WHERE a = 20010104e0 GROUP BY id {
"rows": 9,
"cost": 2.35,
"key_parts_used_for_access": ["id", "a"],
"ranges": ["(0x24a20f) <= (a) <= (0x24a20f)"],
"ranges": ["(2001-01-04) <= (a) <= (2001-01-04)"],
"chosen": false,
"cause": "cost"
},
Expand Down Expand Up @@ -6130,7 +6130,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"index": "start_date",
"ranges":
[
"(0x4ac60f,NULL) < (start_date,end_date)"
"(2019-02-10,NULL) < (start_date,end_date)"
],
"rowid_ordered": false,
"using_mrr": false,
Expand Down Expand Up @@ -6214,7 +6214,7 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
"index": "i_b",
"ranges":
[
"(0xd95b94336a9946a39cf5b58cfe772d8c) <= (b) <= (0xd95b94336a9946a39cf5b58cfe772d8c)"
"(\xD9[\x943j\x99F\xA3\x9C\xF5\xB5\x8C\xFEw-\x8C) <= (b) <= (\xD9[\x943j\x99F\xA3\x9C\xF5\xB5\x8C\xFEw-\x8C)"
],
"rowid_ordered": true,
"using_mrr": false,
Expand Down Expand Up @@ -6268,4 +6268,290 @@ JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
}
]
drop table t1;
#
# MDEV-18880: Optimizer trace prints date in hexadecimal
#
CREATE TABLE t1(i INT PRIMARY KEY, b VARCHAR(10) CHARSET BINARY , INDEX i_b(b));
INSERT INTO t1 VALUES (1, 'ab\n');
INSERT INTO t1 VALUES (2, NULL);
set optimizer_trace=1;
EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i_b i_b 13 const 1 Using index condition
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "i_b",
"ranges":
[
"(ab\x0A) <= (b) <= (ab\x0A)"
],
"rowid_ordered": true,
"using_mrr": false,
"index_only": false,
"rows": 1,
"cost": 2.3787,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
ALTER TABLE t1 modify column b BINARY(10) AFTER i;
EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i_b i_b 11 const 1 Using index condition
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "i_b",
"ranges":
[
"(ab\x0A\x00\x00\x00\x00\x00\x00\x00) <= (b) <= (ab\x0A\x00\x00\x00\x00\x00\x00\x00)"
],
"rowid_ordered": true,
"using_mrr": false,
"index_only": false,
"rows": 1,
"cost": 2.3785,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
ALTER TABLE t1 modify column b VARBINARY(10) AFTER i;
EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i_b i_b 13 const 1 Using index condition
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "i_b",
"ranges":
[
"(ab\x0A) <= (b) <= (ab\x0A)"
],
"rowid_ordered": true,
"using_mrr": false,
"index_only": false,
"rows": 1,
"cost": 2.3787,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
drop table t1;
CREATE TABLE t1(i INT PRIMARY KEY, b CHAR(10), INDEX i_b(b));
INSERT INTO t1 VALUES (1, 'ab\n');
INSERT INTO t1 VALUES (2, NULL);
EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i_b i_b 11 const 1 Using index condition
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "i_b",
"ranges":
[
"(ab\n) <= (b) <= (ab\n)"
],
"rowid_ordered": true,
"using_mrr": false,
"index_only": false,
"rows": 1,
"cost": 2.3785,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
drop table t1;
CREATE TABLE t1(i INT PRIMARY KEY, b blob , INDEX i_b(b));
Warnings:
Note 1071 Specified key was too long; max key length is 1000 bytes
INSERT INTO t1 VALUES (1, 'ab\n');
INSERT INTO t1 VALUES (2, NULL);
set optimizer_trace=1;
EXPLAIN SELECT * FROM t1 WHERE b= 'ab\n';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i_b i_b 1003 const 1 Using where
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "i_b",
"ranges":
[
"(ab\x0A) <= (b) <= (ab\x0A)"
],
"rowid_ordered": false,
"using_mrr": false,
"index_only": false,
"rows": 1,
"cost": 3.5719,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
drop table t1;
CREATE TABLE t1(i INT PRIMARY KEY, b VARCHAR(10), INDEX i_b(b));
INSERT INTO t1 VALUES (1, 'ab\n');
INSERT INTO t1 VALUES (2, 'ab\n');
set optimizer_trace=1;
EXPLAIN SELECT * FROM t1 WHERE b='ab\n';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ref i_b i_b 13 const 2 Using index condition
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "i_b",
"ranges":
[
"(ab\n) <= (b) <= (ab\n)"
],
"rowid_ordered": true,
"using_mrr": false,
"index_only": false,
"rows": 2,
"cost": 3.6324,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
drop table t1;
create table t0(a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table one_k (a int);
insert into one_k select A.a + B.a*10 + C.a*100 from t0 A, t0 B, t0 C;
create table t1 (start_date date, end_date date, filler char(100), key(start_date, end_date)) ;
insert into t1 select date_add(now(), interval a day), date_add(now(), interval (a+7) day), 'data' from one_k;
explain format=json select * from t1 force index(start_date) where start_date >= '2019-02-10' and end_date <'2019-04-01';
EXPLAIN
{
"query_block": {
"select_id": 1,
"table": {
"table_name": "t1",
"access_type": "range",
"possible_keys": ["start_date"],
"key": "start_date",
"key_length": "8",
"used_key_parts": ["start_date", "end_date"],
"rows": 1000,
"filtered": 100,
"index_condition": "t1.start_date >= '2019-02-10' and t1.end_date < '2019-04-01'"
}
}
}
select JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives')) from INFORMATION_SCHEMA.OPTIMIZER_TRACE;
JSON_DETAILED(JSON_EXTRACT(trace, '$**.analyzing_range_alternatives'))
[

{
"range_scan_alternatives":
[

{
"index": "start_date",
"ranges":
[
"(2019-02-10,NULL) < (start_date,end_date)"
],
"rowid_ordered": false,
"using_mrr": false,
"index_only": false,
"rows": 1000,
"cost": 1282.2,
"chosen": true
}
],
"analyzing_roworder_intersect":
{
"cause": "too few roworder scans"
},
"analyzing_index_merge_union":
[
]
}
]
drop table t1, t0, one_k;
set optimizer_trace='enabled=off';

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