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MDEV-27021 Implement SHOW ANALYZE command

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This commit is contained in:
Oleg Smirnov
2021-12-24 17:27:03 +03:00
committed by Sergei Petrunia
parent 328684833b
commit e7fcd496d4
13 changed files with 798 additions and 29 deletions
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379
mysql-test/main/show_analyze.result Normal file
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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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#
# Tests for SHOW ANALYZE FOR functionality
#
--source include/have_debug.inc
--source include/have_debug_sync.inc
--source include/have_innodb.inc
# Using valgrind can cause 'reap' to fail. See comment below
--source include/not_valgrind.inc
--disable_warnings
drop table if exists t0, t1, t2, t3, t4;
drop view if exists v1;
--enable_warnings
SET @old_debug= @@session.debug;
#
# Testcases in this file do not work with embedded server. The reason for this
# is that we use the following commands for synchronization:
#
# set @show_explain_probe_select_id=1;
# SET debug_dbug='d,show_explain_probe_join_exec_start';
# send select count(*) from t1 where a < 100000;
#
# When ran with mysqltest_embedded, this translates into:
#
# Thread1> DBUG_PUSH("d,show_explain_probe_join_exec_start");
# Thread1> create another thread for doing "send ... reap"
# Thread2> mysql_parse("select count(*) from t1 where a < 100000");
#
# That is, "select count(*) ..." is ran in a thread for which DBUG_PUSH(...)
# has not been called. As a result, show_explain_probe_join_exec_start does not fire, and
# "select count(*) ..." does not wait till its SHOW ANALYZE command, and the
# test fails.
#
-- source include/not_embedded.inc
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;
#
# Try SHOW ANALYZE for a non-existent thread
#
--error ER_NO_SUCH_THREAD
show analyze for 1001;
--error ER_SET_CONSTANTS_ONLY
show analyze for (select a from t0 limit 1);
#
# Setup two threads and their ids
#
let $thr1=`select connection_id()`;
connect (con1, localhost, root,,);
connection con1;
let $thr2=`select connection_id()`;
SET @old_debug= @@session.debug;
connection default;
# SHOW ANALYZE FOR <idle thread>
--error ER_TARGET_NOT_EXPLAINABLE
evalp show analyze for $thr2;
# SHOW ANALYZE FOR <ourselves>
--error ER_TARGET_NOT_EXPLAINABLE
evalp show analyze for $thr1;
let $wait_condition= select State='show_explain_trap' from information_schema.processlist where id=$thr2;
#
# Test SHOW ANALYZE for simple queries
#
connection con1;
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send select count(*) from t1 where c < 500;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
send select max(c) from t1 where c < 10;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
--echo # We can catch ANALYZE too.
send analyze select max(c) from t1 where a < 10;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # UNION, select, first branch
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
--echo # UNION, select, second branch
set @show_explain_probe_select_id=2; # <--- Second branch
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
--echo # UNION, analyze, first branch
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
--echo # UNION, analyze, second branch
set @show_explain_probe_select_id=2;
send analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # Uncorrelated subquery, select
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send select a, (select max(a) from t0 B where a>6) from t0 A where a<2;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # Uncorrelated subquery, analyze
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send analyze select a, (select max(a) from t0 B where a>6) from t0 A where a<2;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # correlated subquery, select, before execution start
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_start';
send select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # correlated subquery, select, after execution
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # correlated subquery, analyze
set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
send analyze select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo # Try to do SHOW ANALYZE for a query that runs a SET command:
--echo #
set @show_explain_probe_select_id=2; # <---
SET debug_dbug='+d,show_explain_probe_join_exec_start';
send set @foo= (select max(a) from t0 where sin(a) >0);
connection default;
--source include/wait_condition.inc
--error ER_TARGET_NOT_EXPLAINABLE
evalp show analyze for $thr2;
evalp kill query $thr2;
connection con1;
--error ER_QUERY_INTERRUPTED
reap;
SET debug_dbug=@old_debug;
--echo #
--echo # Attempt SHOW ANALYZE for an UPDATE
--echo #
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';
send update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3 ;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
drop table t2;
SET debug_dbug=@old_debug;
--echo #
--echo # Attempt SHOW ANALYZE for a DELETE
--echo #
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';
send delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3 ;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
drop table t2;
SET debug_dbug=@old_debug;
--echo #
--echo # Multiple SHOW ANALYZE calls for one select
--echo #
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';
send select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
--source include/wait_condition.inc
evalp show analyze for $thr2;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
drop table t2;
--echo #
--echo # SHOW ANALYZE for SELECT ... ORDER BY with "Using filesort"
--echo #
SET debug_dbug='+d,show_explain_probe_join_exec_end';
set @show_explain_probe_select_id=1;
send select * from t0 order by a;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo #
--echo # SHOW ANALYZE for SELECT ... with "Using temporary"
--echo #
connection con1;
SET debug_dbug='+d,show_explain_probe_join_exec_end';
set @show_explain_probe_select_id=1;
send select distinct a from t0;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
--echo #
--echo # SHOW ANALYZE for SELECT ... with "Using temporary; Using filesort"
--echo #
SET debug_dbug='+d,show_explain_probe_join_exec_end';
set @show_explain_probe_select_id=1;
send select distinct a from t0;
connection default;
--source include/wait_condition.inc
evalp show analyze for $thr2;
connection con1;
reap;
SET debug_dbug=@old_debug;
drop table t0,t1;
--echo # End
connection default;
disconnect con1;
set debug_sync='RESET';

12
mysql-test/main/show_explain.result
View File

@ -26,13 +26,13 @@ connection con1;
SET @old_debug= @@session.debug; SET @old_debug= @@session.debug;
connection default; connection default;
show explain for $thr2; show explain for $thr2;
ERROR HY000: Target is not running an EXPLAINable command ERROR HY000: Target is not executing an operation with a query plan
explain for connection $thr2; explain for connection $thr2;
ERROR HY000: Target is not running an EXPLAINable command ERROR HY000: Target is not executing an operation with a query plan
show explain for $thr1; show explain for $thr1;
ERROR HY000: Target is not running an EXPLAINable command ERROR HY000: Target is not executing an operation with a query plan
explain for connection $thr1; explain for connection $thr1;
ERROR HY000: Target is not running an EXPLAINable command ERROR HY000: Target is not executing an operation with a query plan
connection con1; connection con1;
set @show_explain_probe_select_id=1; set @show_explain_probe_select_id=1;
SET debug_dbug='+d,show_explain_probe_join_exec_start'; SET debug_dbug='+d,show_explain_probe_join_exec_start';
@ -248,7 +248,7 @@ SET debug_dbug='+d,show_explain_probe_join_exec_start';
set @foo= (select max(a) from t0 where sin(a) >0); set @foo= (select max(a) from t0 where sin(a) >0);
connection default; connection default;
show explain for $thr2; show explain for $thr2;
ERROR HY000: Target is not running an EXPLAINable command ERROR HY000: Target is not executing an operation with a query plan
kill query $thr2; kill query $thr2;
connection con1; connection con1;
ERROR 70100: Query execution was interrupted ERROR 70100: Query execution was interrupted
@ -572,7 +572,7 @@ SET debug_dbug='+d,show_explain_probe_join_exec_end';
SELECT * FROM v1, t2; SELECT * FROM v1, t2;
connection default; connection default;
show explain for $thr2; show explain for $thr2;
ERROR HY000: Target is not running an EXPLAINable command ERROR HY000: Target is not executing an operation with a query plan
kill query $thr2; kill query $thr2;
connection con1; connection con1;
ERROR 70100: Query execution was interrupted ERROR 70100: Query execution was interrupted

1
sql/handler.h
View File

@ -1025,6 +1025,7 @@ enum enum_schema_tables
SCH_EVENTS, SCH_EVENTS,
SCH_EXPLAIN_TABULAR, SCH_EXPLAIN_TABULAR,
SCH_EXPLAIN_JSON, SCH_EXPLAIN_JSON,
SCH_ANALYZE,
SCH_FILES, SCH_FILES,
SCH_GLOBAL_STATUS, SCH_GLOBAL_STATUS,
SCH_GLOBAL_VARIABLES, SCH_GLOBAL_VARIABLES,

1
sql/mysqld.cc
View File

@ -3507,6 +3507,7 @@ SHOW_VAR com_status_vars[]= {
{"show_errors", STMT_STATUS(SQLCOM_SHOW_ERRORS)}, {"show_errors", STMT_STATUS(SQLCOM_SHOW_ERRORS)},
{"show_events", STMT_STATUS(SQLCOM_SHOW_EVENTS)}, {"show_events", STMT_STATUS(SQLCOM_SHOW_EVENTS)},
{"show_explain", STMT_STATUS(SQLCOM_SHOW_EXPLAIN)}, {"show_explain", STMT_STATUS(SQLCOM_SHOW_EXPLAIN)},
{"show_analyze", STMT_STATUS(SQLCOM_SHOW_ANALYZE)},
{"show_fields", STMT_STATUS(SQLCOM_SHOW_FIELDS)}, {"show_fields", STMT_STATUS(SQLCOM_SHOW_FIELDS)},
#ifndef DBUG_OFF #ifndef DBUG_OFF
{"show_function_code", STMT_STATUS(SQLCOM_SHOW_FUNC_CODE)}, {"show_function_code", STMT_STATUS(SQLCOM_SHOW_FUNC_CODE)},

1
sql/privilege.h
View File

@ -634,6 +634,7 @@ constexpr privilege_t PRIV_STMT_DROP_SERVER= FEDERATED_ADMIN_ACL | SUPER_ACL;
/* Privileges related to processes */ /* Privileges related to processes */
constexpr privilege_t PRIV_COM_PROCESS_INFO= PROCESS_ACL; constexpr privilege_t PRIV_COM_PROCESS_INFO= PROCESS_ACL;
// This privilege applies both for SHOW EXPLAIN and SHOW ANALYZE
constexpr privilege_t PRIV_STMT_SHOW_EXPLAIN= PROCESS_ACL; constexpr privilege_t PRIV_STMT_SHOW_EXPLAIN= PROCESS_ACL;
constexpr privilege_t PRIV_STMT_SHOW_ENGINE_STATUS= PROCESS_ACL; constexpr privilege_t PRIV_STMT_SHOW_ENGINE_STATUS= PROCESS_ACL;
constexpr privilege_t PRIV_STMT_SHOW_ENGINE_MUTEX= PROCESS_ACL; constexpr privilege_t PRIV_STMT_SHOW_ENGINE_MUTEX= PROCESS_ACL;

4
sql/share/errmsg-utf8.txt
View File

@ -8725,9 +8725,9 @@ ER_NO_SUCH_TABLE_IN_ENGINE 42S02
spa "La tabla '%-.192s.%-.192s' no existe en el motor" spa "La tabla '%-.192s.%-.192s' no existe en el motor"
swe "Det finns ingen tabell som heter '%-.192s.%-.192s' i handlern" swe "Det finns ingen tabell som heter '%-.192s.%-.192s' i handlern"
ER_TARGET_NOT_EXPLAINABLE ER_TARGET_NOT_EXPLAINABLE
eng "Target is not executing an operation with a query plan"
chi "目标未运行可解释的命令" chi "目标未运行可解释的命令"
eng "Target is not running an EXPLAINable command" spa "El objetivo no está ejecutando una operación con un plan de consulta (query)"
spa "El objetivo no está ejecutando un comando EXPLAINable"
ER_CONNECTION_ALREADY_EXISTS ER_CONNECTION_ALREADY_EXISTS
chi "连接'%.*s'与现有连接'%.*s'冲突" chi "连接'%.*s'与现有连接'%.*s'冲突"
eng "Connection '%.*s' conflicts with existing connection '%.*s'" eng "Connection '%.*s' conflicts with existing connection '%.*s'"

1
sql/sp_head.cc
View File

@ -221,6 +221,7 @@ sp_get_flags_for_command(LEX *lex)
case SQLCOM_SHOW_DATABASES: case SQLCOM_SHOW_DATABASES:
case SQLCOM_SHOW_ERRORS: case SQLCOM_SHOW_ERRORS:
case SQLCOM_SHOW_EXPLAIN: case SQLCOM_SHOW_EXPLAIN:
case SQLCOM_SHOW_ANALYZE:
case SQLCOM_SHOW_FIELDS: case SQLCOM_SHOW_FIELDS:
case SQLCOM_SHOW_FUNC_CODE: case SQLCOM_SHOW_FUNC_CODE:
case SQLCOM_SHOW_GENERIC: case SQLCOM_SHOW_GENERIC:

3
sql/sql_cmd.h
View File

@ -88,7 +88,8 @@ enum enum_sql_command {
SQLCOM_SHOW_RELAYLOG_EVENTS, SQLCOM_SHOW_RELAYLOG_EVENTS,
SQLCOM_GET_DIAGNOSTICS, SQLCOM_GET_DIAGNOSTICS,
SQLCOM_SLAVE_ALL_START, SQLCOM_SLAVE_ALL_STOP, SQLCOM_SLAVE_ALL_START, SQLCOM_SLAVE_ALL_STOP,
SQLCOM_SHOW_EXPLAIN, SQLCOM_SHUTDOWN, SQLCOM_SHOW_EXPLAIN,
SQLCOM_SHOW_ANALYZE, SQLCOM_SHUTDOWN,
SQLCOM_CREATE_ROLE, SQLCOM_DROP_ROLE, SQLCOM_GRANT_ROLE, SQLCOM_REVOKE_ROLE, SQLCOM_CREATE_ROLE, SQLCOM_DROP_ROLE, SQLCOM_GRANT_ROLE, SQLCOM_REVOKE_ROLE,
SQLCOM_COMPOUND, SQLCOM_COMPOUND,
SQLCOM_SHOW_GENERIC, SQLCOM_SHOW_GENERIC,

2
sql/sql_parse.cc
View File

@ -665,6 +665,7 @@ void init_update_queries(void)
sql_command_flags[SQLCOM_SHOW_ENGINE_MUTEX]= CF_STATUS_COMMAND; sql_command_flags[SQLCOM_SHOW_ENGINE_MUTEX]= CF_STATUS_COMMAND;
sql_command_flags[SQLCOM_SHOW_ENGINE_LOGS]= CF_STATUS_COMMAND; sql_command_flags[SQLCOM_SHOW_ENGINE_LOGS]= CF_STATUS_COMMAND;
sql_command_flags[SQLCOM_SHOW_EXPLAIN]= CF_STATUS_COMMAND; sql_command_flags[SQLCOM_SHOW_EXPLAIN]= CF_STATUS_COMMAND;
sql_command_flags[SQLCOM_SHOW_ANALYZE]= CF_STATUS_COMMAND;
sql_command_flags[SQLCOM_SHOW_PROCESSLIST]= CF_STATUS_COMMAND; sql_command_flags[SQLCOM_SHOW_PROCESSLIST]= CF_STATUS_COMMAND;
sql_command_flags[SQLCOM_SHOW_GRANTS]= CF_STATUS_COMMAND; sql_command_flags[SQLCOM_SHOW_GRANTS]= CF_STATUS_COMMAND;
sql_command_flags[SQLCOM_SHOW_CREATE_USER]= CF_STATUS_COMMAND; sql_command_flags[SQLCOM_SHOW_CREATE_USER]= CF_STATUS_COMMAND;
@ -3879,6 +3880,7 @@ mysql_execute_command(THD *thd, bool is_called_from_prepared_stmt)
break; break;
} }
case SQLCOM_SHOW_EXPLAIN: case SQLCOM_SHOW_EXPLAIN:
case SQLCOM_SHOW_ANALYZE:
{ {
if (!thd->security_ctx->priv_user[0] && if (!thd->security_ctx->priv_user[0] &&
check_global_access(thd, PRIV_STMT_SHOW_EXPLAIN)) check_global_access(thd, PRIV_STMT_SHOW_EXPLAIN))

65
sql/sql_show.cc
View File

@ -3000,8 +3000,8 @@ void Show_explain_request::call_in_target_thread()
DBUG_ASSERT(current_thd == target_thd); DBUG_ASSERT(current_thd == target_thd);
set_current_thd(request_thd); set_current_thd(request_thd);
if (target_thd->lex->print_explain(explain_buf, 0 /* explain flags*/, if (target_thd->lex->print_explain(explain_buf, 0 /* explain flags*/,
false /*TODO: analyze? */, is_analyze, is_json_format,
is_json_format, &printed_anything)) &printed_anything))
{ {
failed_to_produce= TRUE; failed_to_produce= TRUE;
} }
@ -3119,16 +3119,16 @@ void select_result_text_buffer::save_to(String *res)
/* /*
Store the SHOW EXPLAIN output in the temporary table. Store the SHOW EXPLAIN/SHOW ANALYZE output in the temporary table.
*/ */
int fill_show_explain(THD *thd, TABLE_LIST *table, COND *cond, int fill_show_explain_or_analyze(THD *thd, TABLE_LIST *table, COND *cond,
bool json_format) bool json_format, bool is_analyze)
{ {
const char *calling_user; const char *calling_user;
THD *tmp; THD *tmp;
my_thread_id thread_id; my_thread_id thread_id;
DBUG_ENTER("fill_show_explain"); DBUG_ENTER("fill_show_explain_or_analyze");
DBUG_ASSERT(cond==NULL); DBUG_ASSERT(cond==NULL);
thread_id= thd->lex->value_list.head()->val_int(); thread_id= thd->lex->value_list.head()->val_int();
@ -3140,10 +3140,10 @@ int fill_show_explain(THD *thd, TABLE_LIST *table, COND *cond,
Security_context *tmp_sctx= tmp->security_ctx; Security_context *tmp_sctx= tmp->security_ctx;
/* /*
If calling_user==NULL, calling thread has SUPER or PROCESS If calling_user==NULL, calling thread has SUPER or PROCESS
privilege, and so can do SHOW EXPLAIN on any user. privilege, and so can do SHOW EXPLAIN/SHOW ANALYZE on any user.
if calling_user!=NULL, he's only allowed to view SHOW EXPLAIN on if calling_user!=NULL, he's only allowed to view
his own threads. SHOW EXPLAIN/SHOW ANALYZE on his own threads.
*/ */
if (calling_user && (!tmp_sctx->user || strcmp(calling_user, if (calling_user && (!tmp_sctx->user || strcmp(calling_user,
tmp_sctx->user))) tmp_sctx->user)))
@ -3163,7 +3163,7 @@ int fill_show_explain(THD *thd, TABLE_LIST *table, COND *cond,
bool bres; bool bres;
/* /*
Ok we've found the thread of interest and it won't go away because Ok we've found the thread of interest and it won't go away because
we're holding its LOCK_thd_kill. Post it a SHOW EXPLAIN request. we're holding its LOCK_thd_kill. Post it a SHOW EXPLAIN/SHOW ANALYZE request.
*/ */
bool timed_out; bool timed_out;
int timeout_sec= 30; int timeout_sec= 30;
@ -3173,6 +3173,7 @@ int fill_show_explain(THD *thd, TABLE_LIST *table, COND *cond,
explain_buf= new select_result_explain_buffer(thd, table->table); explain_buf= new select_result_explain_buffer(thd, table->table);
explain_req.is_analyze= is_analyze;
explain_req.explain_buf= explain_buf; explain_req.explain_buf= explain_buf;
explain_req.target_thd= tmp; explain_req.target_thd= tmp;
explain_req.request_thd= thd; explain_req.request_thd= thd;
@ -3233,13 +3234,28 @@ int fill_show_explain(THD *thd, TABLE_LIST *table, COND *cond,
int fill_show_explain_tabular(THD *thd, TABLE_LIST *table, COND *cond) int fill_show_explain_tabular(THD *thd, TABLE_LIST *table, COND *cond)
{ {
return fill_show_explain(thd, table, cond, false /*json_format*/); return fill_show_explain_or_analyze(
thd, table, cond, FALSE /* json_format */, FALSE /* is_analyze */);
} }
int fill_show_explain_json(THD *thd, TABLE_LIST *table, COND *cond) int fill_show_explain_json(THD *thd, TABLE_LIST *table, COND *cond)
{ {
return fill_show_explain(thd, table, cond, true /*json_format*/); return fill_show_explain_or_analyze(
thd, table, cond, TRUE /* json_format */, TRUE /* is_analyze */);
int fill_show_analyze_tabular(THD * thd, TABLE_LIST * table, COND * cond)
{
return fill_show_explain_or_analyze(
thd, table, cond, FALSE /* json_format */, TRUE /* is_analyze */);
}
int fill_show_analyze_json(THD * thd, TABLE_LIST * table, COND * cond)
{
return fill_show_explain_or_analyze(
thd, table, cond, TRUE /* json_format */, TRUE /* is_analyze */);
} }
@ -9660,6 +9676,29 @@ ST_FIELD_INFO show_explain_json_fields_info[]=
}; };
ST_FIELD_INFO show_analyze_fields_info[]=
{
Column("id", SLonglong(3), NULLABLE, "id"),
Column("select_type", Varchar(19), NOT_NULL, "select_type"),
Column("table", Name(), NULLABLE, "table"),
Column("type", Varchar(15), NULLABLE, "type"),
Column("possible_keys",Varchar(NAME_CHAR_LEN*MAX_KEY), NULLABLE, "possible_keys"),
Column("key", Varchar(NAME_CHAR_LEN*MAX_KEY), NULLABLE, "key"),
Column("key_len", Varchar(NAME_CHAR_LEN*MAX_KEY), NULLABLE, "key_len"),
Column("ref", Varchar(NAME_CHAR_LEN*MAX_REF_PARTS),NULLABLE, "ref"),
Column("rows", SLonglong(10), NULLABLE, "rows"),
Column("r_rows", Varchar(NAME_CHAR_LEN), NULLABLE, "r_rows"),
/* Fields of type DECIMAL(5,2) to represent percentage.
See Show::Type::decimal_precision() and Show::Type::decimal_scale() to learn
how 502 converts to precision and scale (5 and 2)*/
Column("filtered", Decimal(502), NULLABLE, "filtered"),
Column("r_filtered", Decimal(502), NULLABLE, "r_filtered"),
Column("Extra", Varchar(255), NOT_NULL, "Extra"),
CEnd()
};
ST_FIELD_INFO check_constraints_fields_info[]= ST_FIELD_INFO check_constraints_fields_info[]=
{ {
Column("CONSTRAINT_CATALOG", Catalog(), NOT_NULL, OPEN_FULL_TABLE), Column("CONSTRAINT_CATALOG", Catalog(), NOT_NULL, OPEN_FULL_TABLE),
@ -9723,6 +9762,8 @@ ST_SCHEMA_TABLE schema_tables[]=
{"EXPLAIN", Show::show_explain_tabular_fields_info, 0, fill_show_explain_tabular, {"EXPLAIN", Show::show_explain_tabular_fields_info, 0, fill_show_explain_tabular,
make_old_format, 0, -1, -1, TRUE /*hidden*/ , 0}, make_old_format, 0, -1, -1, TRUE /*hidden*/ , 0},
{"EXPLAIN_JSON", Show::show_explain_json_fields_info, 0, fill_show_explain_json, {"EXPLAIN_JSON", Show::show_explain_json_fields_info, 0, fill_show_explain_json,
make_old_format, 0, -1, -1, TRUE /*hidden*/, 0},
{"ANALYZE", Show::show_analyze_fields_info, 0, fill_show_analyze_tabular,
make_old_format, 0, -1, -1, TRUE /*hidden*/, 0}, make_old_format, 0, -1, -1, TRUE /*hidden*/, 0},
{"FILES", Show::files_fields_info, 0, {"FILES", Show::files_fields_info, 0,
hton_fill_schema_table, 0, 0, -1, -1, 0, 0}, hton_fill_schema_table, 0, 0, -1, -1, 0, 0},

19
sql/sql_show.h
View File

@ -155,34 +155,37 @@ THD *find_thread_by_id(longlong id, bool query_id= false);
class select_result_explain_buffer; class select_result_explain_buffer;
/* /*
SHOW EXPLAIN request object. SHOW EXPLAIN/SHOW ANALYZE request object.
*/ */
class Show_explain_request : public Apc_target::Apc_call class Show_explain_request : public Apc_target::Apc_call
{ {
public: public:
THD *target_thd; /* thd that we're running SHOW EXPLAIN for */ THD *target_thd; /* thd that we're running SHOW EXPLAIN/ANALYZE for */
THD *request_thd; /* thd that run SHOW EXPLAIN command */ THD *request_thd; /* thd that run SHOW EXPLAIN/ANALYZE command */
/* /*
Set to TRUE if you need the result in JSON format, Set to TRUE if you need the result in JSON format,
FALSE - in traditional tabular FALSE - in traditional tabular
*/ */
bool is_json_format= false; bool is_json_format= false;
/* FALSE for SHOW EXPLAIN, TRUE - for SHOW ANALYZE*/
bool is_analyze;
/* If true, there was some error when producing EXPLAIN output. */ /* If true, there was some error when producing EXPLAIN output. */
bool failed_to_produce; bool failed_to_produce;
/* SHOW EXPLAIN will be stored here */ /* SHOW EXPLAIN/ANALYZE will be stored here */
select_result_explain_buffer *explain_buf; select_result_explain_buffer *explain_buf;
/* Query that we've got SHOW EXPLAIN for */ /* Query that we've got SHOW EXPLAIN/ANALYZE for */
String query_str; String query_str;
/* Overloaded virtual function */ void call_in_target_thread() override;
void call_in_target_thread();
}; };
/** /**
Condition pushdown used for INFORMATION_SCHEMA / SHOW queries. Condition pushdown used for INFORMATION_SCHEMA / SHOW queries.
This structure is to implement an optimization when This structure is to implement an optimization when

7
sql/sql_yacc.yy
View File

@ -13948,6 +13948,13 @@ show_param:
MYSQL_YYABORT; MYSQL_YYABORT;
add_value_to_list(thd, $4); add_value_to_list(thd, $4);
} }
| ANALYZE_SYM FOR_SYM expr
{
Lex->sql_command= SQLCOM_SHOW_ANALYZE;
if (unlikely(prepare_schema_table(thd, Lex, 0, SCH_ANALYZE)))
MYSQL_YYABORT;
add_value_to_list(thd, $3);
}
| IDENT_sys remember_tok_start wild_and_where | IDENT_sys remember_tok_start wild_and_where
{ {
LEX *lex= Lex; LEX *lex= Lex;