diff options
Diffstat (limited to 'mysql-test/r/show_explain.result')
| -rw-r--r-- | mysql-test/r/show_explain.result | 113 |
1 files changed, 92 insertions, 21 deletions
diff --git a/mysql-test/r/show_explain.result b/mysql-test/r/show_explain.result index be0b1c28b06..7e0ac0b277c 100644 --- a/mysql-test/r/show_explain.result +++ b/mysql-test/r/show_explain.result @@ -165,7 +165,11 @@ 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<1; show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY a ALL NULL NULL NULL NULL 10 Using where +2 DEPENDENT SUBQUERY b ALL NULL NULL NULL NULL 10 Using where +Warnings: +Note 1003 select a, (select max(a) from t0 b where b.a+a.a<10) from t0 a where a<1 a (select max(a) from t0 b where b.a+a.a<10) 0 9 set debug_dbug=@old_debug; @@ -177,6 +181,8 @@ set debug_dbug='+d,show_explain_probe_join_exec_start'; set @foo= (select max(a) from t0 where sin(a) >0); show explain for $thr2; ERROR HY000: Target is not running an EXPLAINable command +kill query $thr2; +ERROR 70100: Query execution was interrupted set debug_dbug=@old_debug; # # Attempt SHOW EXPLAIN for an UPDATE @@ -186,22 +192,38 @@ 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 ; show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where +Warnings: +Note 1003 update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3 show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where +Warnings: +Note 1003 update t2 set dummy=0 where (select max(a) from t0 where t2.a + t0.a <3) >3 drop table t2; set debug_dbug=@old_debug; # -# Attempt SHOW EXPLAIN for a DELETE +# Attempt SHOW EXPLAIN for a DELETE (UPD: now works) # 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 ; show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where +Warnings: +Note 1003 delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3 show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where +Warnings: +Note 1003 delete from t2 where (select max(a) from t0 where t2.a + t0.a <3) >3 drop table t2; set debug_dbug=@old_debug; # @@ -220,13 +242,13 @@ Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ show explain for $thr2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Query plan already deleted +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 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 explain for $thr2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY t2 ALL NULL NULL NULL NULL 3 -2 DEPENDENT SUBQUERY NULL NULL NULL NULL NULL NULL NULL Query plan already deleted +2 DEPENDENT SUBQUERY t0 ALL NULL NULL NULL NULL 10 Using where Warnings: Note 1003 select t2.a, ((select max(a) from t0 where t2.a + t0.a <3) >3) as SUBQ from t2 a SUBQ @@ -327,7 +349,11 @@ SELECT alias.a FROM t2, ( SELECT * FROM t2 ) AS alias GROUP BY alias.a; # FIXED by "conservative assumptions about when QEP is available" fix: # NOTE: current code will not show "Using join buffer": show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using temporary; Using filesort +1 SIMPLE t2 ALL NULL NULL NULL NULL 5 Using join buffer (flat, BNL join) +Warnings: +Note 1003 SELECT alias.a FROM t2, ( SELECT * FROM t2 ) AS alias GROUP BY alias.a a 1 2 @@ -381,13 +407,8 @@ set debug_dbug='+d,show_explain_probe_join_exec_end'; SELECT * FROM v1, t2; show explain for $thr2; ERROR HY000: Target is not running an EXPLAINable command -a b -8 4 -8 5 -8 6 -8 7 -8 8 -8 9 +kill query $thr2; +ERROR 70100: Query execution was interrupted set debug_dbug=@old_debug; DROP VIEW v1; DROP TABLE t2, t3; @@ -412,7 +433,10 @@ set @show_explain_probe_select_id=1; set debug_dbug='+d,show_explain_probe_join_exec_end'; select * from t0 where 1>10; show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE +Warnings: +Note 1003 select * from t0 where 1>10 a set debug_dbug=@old_debug; # @@ -424,7 +448,10 @@ set @show_explain_probe_select_id=1; set debug_dbug='+d,show_explain_probe_join_exec_end'; select * from t0,t3 where t3.a=112233; show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE NULL NULL NULL NULL NULL NULL NULL no matching row in const table +Warnings: +Note 1003 select * from t0,t3 where t3.a=112233 a a set debug_dbug=@old_debug; drop table t3; @@ -529,7 +556,12 @@ set @show_explain_probe_select_id=1; set debug_dbug='+d,show_explain_probe_join_exec_end'; SELECT * FROM t2 WHERE (5, 78) IN (SELECT `a1`, MAX(`a1`) FROM t2 GROUP BY `a1`); show explain for $thr2; -ERROR HY000: Target is not running an EXPLAINable command +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY <subquery2> const distinct_key distinct_key 8 const,const 1 +1 PRIMARY t2 ALL NULL NULL NULL NULL 20 Using join buffer (flat, BNL join) +2 MATERIALIZED t2 index NULL a1 4 NULL 20 Using index +Warnings: +Note 1003 SELECT * FROM t2 WHERE (5, 78) IN (SELECT `a1`, MAX(`a1`) FROM t2 GROUP BY `a1`) pk a1 set debug_dbug=@old_debug; DROP TABLE t2; @@ -635,7 +667,7 @@ SELECT a + 1 FROM v1; show explain for $thr2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 -2 DERIVED NULL NULL NULL NULL NULL NULL NULL Query plan already deleted +2 DERIVED t1 ALL NULL NULL NULL NULL 2 Warnings: Note 1003 SELECT a + 1 FROM v1 a + 1 @@ -1045,7 +1077,7 @@ show explain for $thr2; id select_type table type possible_keys key key_len ref rows Extra 1 PRIMARY alias1 ALL NULL NULL NULL NULL 14 1 PRIMARY t2 ALL NULL NULL NULL NULL 20 -3 SUBQUERY NULL NULL NULL NULL NULL NULL NULL Query plan already deleted +3 SUBQUERY t3 ALL NULL NULL NULL NULL 20 Using where Warnings: Note 1003 SELECT max(a+b+c) FROM t1 AS alias1, ( SELECT * FROM t2 ) AS alias WHERE EXISTS ( SELECT * FROM t3 WHERE b = c ) OR a <= 10 @@ -1095,6 +1127,45 @@ set names default; # show explain for foo; ERROR HY000: You may only use constant expressions in this statement +# +# MDEV-411: SHOW EXPLAIN: For dependent subquery EXPLAIN produces type=index, key, 'Using where; Using index', +# while SHOW EXPLAIN says type=ALL, no key, 'Range checked for each record' +# +CREATE TABLE t1 (a INT NOT NULL, KEY(a)) ENGINE=MyISAM; +INSERT INTO t1 VALUES (7),(0); +CREATE TABLE t2 (b INT NOT NULL) ENGINE=MyISAM; +INSERT INTO t2 VALUES (0),(8); +explain +SELECT SUM(b) FROM ( SELECT * FROM t1 ) AS alias1, t2 +WHERE b <= ANY ( +SELECT a FROM t1 +WHERE a = b + SLEEP(0.2) OR a >= ( SELECT SUM(b) FROM t2 )); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL a 4 NULL 2 Using index +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +3 DEPENDENT SUBQUERY t1 ALL a NULL NULL NULL 2 Range checked for each record (index map: 0x1) +4 SUBQUERY t2 ALL NULL NULL NULL NULL 2 +set @show_explain_probe_select_id=1; +set debug_dbug='+d,show_explain_probe_join_exec_start'; +SELECT SUM(b) FROM ( SELECT * FROM t1 ) AS alias1, t2 +WHERE b <= ANY ( +SELECT a FROM t1 +WHERE a = b + SLEEP(0.2) OR a >= ( SELECT SUM(b) FROM t2 )); +show explain for $thr2; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index NULL a 4 NULL 2 Using index +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +3 DEPENDENT SUBQUERY t1 ALL a NULL NULL NULL 2 Range checked for each record (index map: 0x1) +4 SUBQUERY t2 ALL NULL NULL NULL NULL 2 +Warnings: +Note 1003 SELECT SUM(b) FROM ( SELECT * FROM t1 ) AS alias1, t2 +WHERE b <= ANY ( +SELECT a FROM t1 +WHERE a = b + SLEEP(0.2) OR a >= ( SELECT SUM(b) FROM t2 )) +SUM(b) +0 +set debug_dbug=@old_debug; +DROP TABLE t1,t2; # End drop table t0; set debug_sync='RESET'; |