mirror of
https://github.com/MariaDB/server.git
synced 2025-01-27 09:14:17 +01:00
485 lines
17 KiB
Text
485 lines
17 KiB
Text
drop table if exists t0, t1, t2, t3, t4;
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drop view if exists v1;
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SET @old_debug= @@session.debug;
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set debug_sync='RESET';
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create table t0 (a int);
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insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
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create table t1 (a int);
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alter table t1 add b int, add c int, add filler char(32);
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insert into t1 select A.a, 10*B.a, 100*C.a, 'foo filler' from t0 A, t0 B, t0 C;
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alter table t1 add key(a), add key(b);
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analyze table t1;
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Table Op Msg_type Msg_text
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test.t1 analyze status Engine-independent statistics collected
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test.t1 analyze status Table is already up to date
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show analyze for 1001;
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ERROR HY000: Unknown thread id: 1001
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show analyze for (select a from t0 limit 1);
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ERROR HY000: You may only use constant expressions in this statement
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connect con1, localhost, root,,;
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connection con1;
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SET @old_debug= @@session.debug;
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connection default;
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show analyze for $thr2;
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ERROR HY000: Target is not executing an operation with a query plan
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show analyze for $thr1;
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ERROR HY000: Target is not executing an operation with a query plan
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connection con1;
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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select count(*) from t1 where c < 500;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 1000.00 50.00 50.00 Using where
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Warnings:
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Note 1003 select count(*) from t1 where c < 500
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connection con1;
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count(*)
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500
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select max(c) from t1 where c < 10;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 1000 1000.00 10.00 10.00 Using where
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Warnings:
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Note 1003 select max(c) from t1 where c < 10
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connection con1;
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max(c)
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0
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# We can catch ANALYZE too.
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analyze select max(c) from t1 where a < 10;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL a NULL NULL NULL 1000 1000.00 99.90 100.00 Using where
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Warnings:
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Note 1003 analyze select max(c) from t1 where a < 10
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connection con1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t1 ALL a NULL NULL NULL 1000 1000.00 99.90 100.00 Using where
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SET debug_dbug=@old_debug;
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# UNION, select, first branch
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
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Warnings:
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Note 1003 select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9
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connection con1;
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max(a)
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5
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10
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# UNION, select, second branch
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set @show_explain_probe_select_id=2;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
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Warnings:
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Note 1003 select max(a) from t0 A where a<=5 union select max(a+1) from t0 B where a>=9
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connection con1;
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max(a)
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5
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10
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# UNION, analyze, first branch
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
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Warnings:
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Note 1003 analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9
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connection con1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 NULL NULL
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# UNION, analyze, second branch
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set @show_explain_probe_select_id=2;
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analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 0.00 NULL NULL
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Warnings:
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Note 1003 analyze select a from t0 A where a<=5 union select a+1 from t0 B where a>=9
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connection con1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 60.00 Using where
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2 UNION B ALL NULL NULL NULL NULL 10 10.00 100.00 10.00 Using where
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NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL 7.00 NULL NULL
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SET debug_dbug=@old_debug;
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# Uncorrelated subquery, select
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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select a, (select max(a) from t0 B where a>6) from t0 A where a<2;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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2 SUBQUERY B ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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Warnings:
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Note 1003 select a, (select max(a) from t0 B where a>6) from t0 A where a<2
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connection con1;
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a (select max(a) from t0 B where a>6)
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0 9
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1 9
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SET debug_dbug=@old_debug;
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# Uncorrelated subquery, analyze
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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analyze select a, (select max(a) from t0 B where a>6) from t0 A where a<2;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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2 SUBQUERY B ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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Warnings:
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Note 1003 analyze select a, (select max(a) from t0 B where a>6) from t0 A where a<2
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connection con1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY A ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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2 SUBQUERY B ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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SET debug_dbug=@old_debug;
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# correlated subquery, select, before execution start
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_start';
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select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY a ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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Warnings:
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Note 1003 select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2
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connection con1;
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a (select max(a) from t0 b where b.a+a.a<10)
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0 9
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1 8
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SET debug_dbug=@old_debug;
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# correlated subquery, select, after execution
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY a ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 10.00 100.00 95.00 Using where
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Warnings:
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Note 1003 select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2
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connection con1;
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a (select max(a) from t0 b where b.a+a.a<10)
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0 9
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1 8
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SET debug_dbug=@old_debug;
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# correlated subquery, analyze
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set @show_explain_probe_select_id=1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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analyze select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY a ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 10.00 100.00 95.00 Using where
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Warnings:
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Note 1003 analyze select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<2
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connection con1;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY a ALL NULL NULL NULL NULL 10 10.00 100.00 20.00 Using where
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2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 10.00 100.00 95.00 Using where
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SET debug_dbug=@old_debug;
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# Try to do SHOW ANALYZE for a query that runs a SET command:
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#
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create table t2 (a int);
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insert into t2 values (1),(2);
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set @show_explain_probe_select_id=3;
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SET debug_dbug='+d,show_explain_probe_join_exec_start';
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set @foo= (select max(a) from t2
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where a + (select max(a) from t0 where t0.a>t2.a) < 10000);
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connection default;
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show analyze for $thr2;
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ERROR HY000: Target is not executing an operation with a query plan
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kill query $thr2;
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connection con1;
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ERROR 70100: Query execution was interrupted
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SET debug_dbug=@old_debug;
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drop table t2;
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#
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# Attempt SHOW ANALYZE for an UPDATE
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#
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create table t2 as select a as a, a as dummy from t0 limit 2;
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set @show_explain_probe_select_id=2;
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SET debug_dbug='+d,show_explain_probe_join_exec_start';
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update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3 ;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 1.00 100.00 0.00 Using where
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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Warnings:
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Note 1003 update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 2.00 100.00 0.00 Using where
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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Warnings:
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Note 1003 update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3
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connection con1;
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drop table t2;
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SET debug_dbug=@old_debug;
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#
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# Attempt SHOW ANALYZE for a DELETE
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#
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create table t2 as select a as a, a as dummy from t0 limit 2;
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set @show_explain_probe_select_id=2;
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SET debug_dbug='+d,show_explain_probe_join_exec_start';
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delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3 ;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 1.00 100.00 0.00 Using where
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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Warnings:
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Note 1003 delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 2 2.00 100.00 0.00 Using where
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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Warnings:
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Note 1003 delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3
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connection con1;
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drop table t2;
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SET debug_dbug=@old_debug;
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#
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# Multiple SHOW ANALYZE calls for one select
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#
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create table t2 as select a as a, a as dummy from t0 limit 3;
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set @show_explain_probe_select_id=2;
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SET debug_dbug='+d,show_explain_probe_join_exec_start';
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select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 3 1.00 100.00 100.00
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 NULL 100.00 NULL Using where
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Warnings:
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Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 3 2.00 100.00 100.00
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 30.00 Using where
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Warnings:
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Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 3 3.00 100.00 100.00
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2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 10.00 100.00 25.00 Using where
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Warnings:
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Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2
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connection con1;
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a SUBQ
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0 0
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1 0
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2 0
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SET debug_dbug=@old_debug;
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drop table t2;
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#
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# SHOW ANALYZE for SELECT ... ORDER BY with "Using filesort"
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#
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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set @show_explain_probe_select_id=1;
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select * from t0 order by a;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using filesort
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Warnings:
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Note 1003 select * from t0 order by a
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connection con1;
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a
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0
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1
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2
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3
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4
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5
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6
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7
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8
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9
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SET debug_dbug=@old_debug;
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#
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# SHOW ANALYZE for SELECT ... with "Using temporary"
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#
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connection con1;
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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set @show_explain_probe_select_id=1;
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select distinct a from t0;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using temporary
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Warnings:
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Note 1003 select distinct a from t0
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connection con1;
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a
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0
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1
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2
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3
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4
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5
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6
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7
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8
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9
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SET debug_dbug=@old_debug;
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#
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# SHOW ANALYZE for SELECT ... with "Using temporary; Using filesort"
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#
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SET debug_dbug='+d,show_explain_probe_join_exec_end';
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set @show_explain_probe_select_id=1;
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select distinct a from t0;
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connection default;
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show analyze for $thr2;
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id select_type table type possible_keys key key_len ref rows r_rows filtered r_filtered Extra
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1 SIMPLE t0 ALL NULL NULL NULL NULL 10 10.00 100.00 100.00 Using temporary
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Warnings:
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Note 1003 select distinct a from t0
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connection con1;
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a
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0
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1
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2
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3
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4
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5
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6
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7
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8
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9
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SET debug_dbug=@old_debug;
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drop table t0,t1;
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#
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# MDEV-28124: Server crashes in Explain_aggr_filesort::print_json_members
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# upon SHOW ANALYZE/EXPLAIN FORMAT=JSON
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#
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connection con1;
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set @show_explain_probe_query= 'SELECT count(*) - count(*) FROM sys.waits_by_user_by_latency';
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set debug_dbug='+d,explain_notify_tables_are_closed';
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SELECT count(*) - count(*) FROM sys.waits_by_user_by_latency;
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connection default;
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SHOW ANALYZE FOR $thr2;
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ERROR HY000: Target is not executing an operation with a query plan
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connection con1;
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count(*) - count(*)
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0
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# End
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connection default;
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disconnect con1;
|
|
set debug_sync='RESET';
|
|
#
|
|
# MDEV-28201: Server crashes upon SHOW ANALYZE/EXPLAIN FORMAT=JSON
|
|
#
|
|
CREATE TABLE t1 ( a varchar(1));
|
|
INSERT INTO t1 VALUES ('a'),('b');
|
|
ANALYZE format=json
|
|
SELECT 1 FROM t1 GROUP BY convert_tz('1969-12-31 22:00:00',a,'+10:00');
|
|
ANALYZE
|
|
{
|
|
"query_optimization": {
|
|
"r_total_time_ms": "REPLACED"
|
|
},
|
|
"query_block": {
|
|
"select_id": 1,
|
|
"cost": "REPLACED",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"filesort": {
|
|
"sort_key": "convert_tz('1969-12-31 22:00:00',t1.a,'+10:00')",
|
|
"r_loops": 1,
|
|
"r_total_time_ms": "REPLACED",
|
|
"r_used_priority_queue": false,
|
|
"r_output_rows": 1,
|
|
"r_buffer_size": "REPLACED",
|
|
"r_sort_mode": "sort_key,rowid",
|
|
"temporary_table": {
|
|
"nested_loop": [
|
|
{
|
|
"table": {
|
|
"table_name": "t1",
|
|
"access_type": "ALL",
|
|
"loops": 1,
|
|
"r_loops": 1,
|
|
"rows": 2,
|
|
"r_rows": 2,
|
|
"cost": "REPLACED",
|
|
"r_table_time_ms": "REPLACED",
|
|
"r_other_time_ms": "REPLACED",
|
|
"r_engine_stats": REPLACED,
|
|
"filtered": 100,
|
|
"r_filtered": 100
|
|
}
|
|
}
|
|
]
|
|
}
|
|
}
|
|
}
|
|
}
|
|
DROP TABLE t1;
|
|
#
|
|
# MDEV-31432 tmp_table field accessed after free
|
|
# testing for the above (MDEV-28201) caused use after free error
|
|
#
|
|
create table t1 (x int) engine=myisam;
|
|
insert into t1 values(1);
|
|
set @tmp=@@optimizer_trace;
|
|
set @@optimizer_trace=1;
|
|
SELECT
|
|
1 IN
|
|
((
|
|
SELECT
|
|
1 IN (SELECT 1 AS x0
|
|
FROM
|
|
(
|
|
SELECT *
|
|
FROM (SELECT 1 AS x) AS x5
|
|
GROUP BY x,x
|
|
HAVING
|
|
x IN (
|
|
SELECT *
|
|
FROM t1 AS x1
|
|
WHERE
|
|
x IN (SELECT 1 AS x
|
|
FROM t1 AS x3
|
|
GROUP BY x
|
|
HAVING
|
|
x IN (SELECT 0 FROM t1 AS x4)
|
|
)
|
|
)
|
|
) AS x6
|
|
)
|
|
FROM
|
|
t1
|
|
)) as VAL;
|
|
VAL
|
|
0
|
|
set optimizer_trace=@tmp;
|
|
drop table t1;
|