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MDEV-27021 Implement SHOW ANALYZE command
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@spetrunia
Oleg Smirnov authored and spetrunia committed Apr 29, 2022
1 parent 3286848 commit e7fcd49
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379 changes: 379 additions & 0 deletions mysql-test/main/show_analyze.result
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drop table if exists t0, t1, t2, t3, t4;
drop view if exists v1;
SET @old_debug= @@session.debug;
set debug_sync='RESET';
create table t0 (a int);
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
create table t1 (a int);
alter table t1 add b int, add c int, add filler char(32);
insert into t1 select A.a, 10*B.a, 100*C.a, 'foo filler' from t0 A, t0 B, t0 C;
alter table t1 add key(a), add key(b);
analyze table t1;
Table Op Msg_type Msg_text
test.t1 analyze status Engine-independent statistics collected
test.t1 analyze status Table is already up to date
show analyze for 1001;
ERROR HY000: Unknown thread id: 1001
show analyze for (select a from t0 limit 1);
ERROR HY000: You may only use constant expressions in this statement
connect con1, localhost, root,,;
connection con1;
SET @old_debug= @@session.debug;
connection default;
show analyze for $thr2;
ERROR HY000: Target is not executing an operation with a query plan
show analyze for $thr1;
ERROR HY000: Target is not executing an operation with a query plan
connection con1;
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
select count(*) from t1 where c < 500;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 1000.00 59.38 50.00 Using where
Warnings:
Note 1003 select count(*) from t1 where c < 500
connection con1;
count(*)
500
select max(c) from t1 where c < 10;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 1000.00 10.16 10.00 Using where
Warnings:
Note 1003 select max(c) from t1 where c < 10
connection con1;
max(c)
0
# We can catch ANALYZE too.
analyze select max(c) from t1 where a < 10;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL a NULL NULL NULL 1000 1000.00 99.90 100.00 Using where
Warnings:
Note 1003 analyze select max(c) from t1 where a < 10
connection con1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t1 ALL a NULL NULL NULL 1000 1000.00 99.90 100.00 Using where
SET debug_dbug=@old_debug;
# UNION, select, first branch
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
Warnings:
Note 1003 select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9
connection con1;
max(a)
5
10
# UNION, select, second branch
set @show_explain_probe_select_id=2;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
Warnings:
Note 1003 select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9
connection con1;
max(a)
5
10
# UNION, analyze, first branch
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
Warnings:
Note 1003 analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9
connection con1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 NULL NULL
# UNION, analyze, second branch
set @show_explain_probe_select_id=2;
analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
Warnings:
Note 1003 analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9
connection con1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 NULL NULL
SET debug_dbug=@old_debug;
# Uncorrelated subquery, select
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
select a, (select max(a) from t0 B where a>6) from t0 A where a<2;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
2 SUBQUERY B ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
Warnings:
Note 1003 select a, (select max(a) from t0 B where a>6) from t0 A where a<2
connection con1;
a (select max(a) from t0 B where a>6)
0 9
1 9
SET debug_dbug=@old_debug;
# Uncorrelated subquery, analyze
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
analyze select a, (select max(a) from t0 B where a>6) from t0 A where a<2;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
2 SUBQUERY B ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
Warnings:
Note 1003 analyze select a, (select max(a) from t0 B where a>6) from t0 A where a<2
connection con1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
2 SUBQUERY B ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
SET debug_dbug=@old_debug;
# correlated subquery, select, before execution start
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_start';
select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY a ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
Warnings:
Note 1003 select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2
connection con1;
a (select max(a) from t0 b where b.a+a.a<10)
0 9
1 8
SET debug_dbug=@old_debug;
# correlated subquery, select, after execution
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY a ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 10.00 100.00 95.00 Using where
Warnings:
Note 1003 select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2
connection con1;
a (select max(a) from t0 b where b.a+a.a<10)
0 9
1 8
SET debug_dbug=@old_debug;
# correlated subquery, analyze
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
analyze select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY a ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 10.00 100.00 95.00 Using where
Warnings:
Note 1003 analyze select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2
connection con1;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY a ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 10.00 100.00 95.00 Using where
SET debug_dbug=@old_debug;
# Try to do SHOW ANALYZE for a query that runs a SET command:
#
set @show_explain_probe_select_id=2;
SET debug_dbug='+d,show_explain_probe_join_exec_start';
set @foo= (select max(a) from t0 where sin(a) >0);
connection default;
show analyze for $thr2;
ERROR HY000: Target is not executing an operation with a query plan
kill query $thr2;
connection con1;
ERROR 70100: Query execution was interrupted
SET debug_dbug=@old_debug;
#
# Attempt SHOW ANALYZE for an UPDATE
#
create table t2 as select a as a, a as dummy from t0 limit 2;
set @show_explain_probe_select_id=2;
SET debug_dbug='+d,show_explain_probe_join_exec_start';
update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3 ;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 1.00 100.00 0.00 Using where
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
Warnings:
Note 1003 update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 2.00 100.00 0.00 Using where
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
Warnings:
Note 1003 update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3
connection con1;
drop table t2;
SET debug_dbug=@old_debug;
#
# Attempt SHOW ANALYZE for a DELETE
#
create table t2 as select a as a, a as dummy from t0 limit 2;
set @show_explain_probe_select_id=2;
SET debug_dbug='+d,show_explain_probe_join_exec_start';
delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3 ;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 1.00 100.00 0.00 Using where
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
Warnings:
Note 1003 delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 2 2.00 100.00 0.00 Using where
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
Warnings:
Note 1003 delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3
connection con1;
drop table t2;
SET debug_dbug=@old_debug;
#
# Multiple SHOW ANALYZE calls for one select
#
create table t2 as select a as a, a as dummy from t0 limit 3;
set @show_explain_probe_select_id=2;
SET debug_dbug='+d,show_explain_probe_join_exec_start';
select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 1.00 100.00 100.00
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
Warnings:
Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 2.00 100.00 100.00
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
Warnings:
Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 25.00 Using where
Warnings:
Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2
connection con1;
a SUBQ
0 0
1 0
2 0
SET debug_dbug=@old_debug;
drop table t2;
#
# SHOW ANALYZE for SELECT ... ORDER BY with "Using filesort"
#
SET debug_dbug='+d,show_explain_probe_join_exec_end';
set @show_explain_probe_select_id=1;
select * from t0 order by a;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using filesort
Warnings:
Note 1003 select * from t0 order by a
connection con1;
a
0
1
2
3
4
5
6
7
8
9
SET debug_dbug=@old_debug;
#
# SHOW ANALYZE for SELECT ... with "Using temporary"
#
connection con1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
set @show_explain_probe_select_id=1;
select distinct a from t0;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using temporary
Warnings:
Note 1003 select distinct a from t0
connection con1;
a
0
1
2
3
4
5
6
7
8
9
SET debug_dbug=@old_debug;
#
# SHOW ANALYZE for SELECT ... with "Using temporary; Using filesort"
#
SET debug_dbug='+d,show_explain_probe_join_exec_end';
set @show_explain_probe_select_id=1;
select distinct a from t0;
connection default;
show analyze for $thr2;
id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using temporary
Warnings:
Note 1003 select distinct a from t0
connection con1;
a
0
1
2
3
4
5
6
7
8
9
SET debug_dbug=@old_debug;
drop table t0,t1;
# End
connection default;
disconnect con1;
set debug_sync='RESET';
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