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MWL#90, code cleanup
- Unify EXPLAIN printout for <subqueryN> tables with regular tables - Update test results for <subqueryN> tables: s/unique_key/distinct_key/g s/1.0/100.0/ for "filtered" column
This commit is contained in:
Sergey Petrunya
@ -1017,7 +1017,7 @@ update t22 set c = '2005-12-08 15:58:27' where a = 255;
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explain select t21.* from t21,t22 where t21.a = t22.a and
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t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 8 Using temporary; Using filesort
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1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
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1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
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2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
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@ -1035,7 +1035,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY X ALL NULL NULL NULL NULL 2
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2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where
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2 DEPENDENT SUBQUERY <subquery3> eq_ref unique_key unique_key 5 func 1
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2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 5 func 1
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3 SUBQUERY Z ALL NULL NULL NULL NULL 2
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select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
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subq
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@ -1158,7 +1158,7 @@ create table t3 ( a int , filler char(100), key(a));
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insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
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explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 2
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
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1 PRIMARY t3 ref a a 5 test.t2.a 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
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select * from t3 where a in (select a from t2);
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@ -1207,7 +1207,7 @@ insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C
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explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref a a 5 test.t2.a 10
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
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explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
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@ -1241,14 +1241,14 @@ insert into t0 values(1,1);
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explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t0 system NULL NULL NULL NULL 1
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref a a 5 test.t2.a 10
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
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create table t4 as select a as x, a as y from t1;
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explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t0 system NULL NULL NULL NULL 1
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where
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2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where
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drop table t0,t1,t2,t3,t4;
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@ -1274,14 +1274,14 @@ set @@optimizer_switch='firstmatch=off';
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explain select * from t1 where (a,b) in (select a,b from t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 10
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 10 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
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set @save_optimizer_search_depth=@@optimizer_search_depth;
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set @@optimizer_search_depth=63;
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explain select * from t1 where (a,b) in (select a,b from t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 10
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 10 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
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set @@optimizer_search_depth=@save_optimizer_search_depth;
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set @@optimizer_switch=default;
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@ -1320,7 +1320,7 @@ insert into t2 select * from t2;
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explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 15 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 15 func,func,func 1
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2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer
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2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer
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@ -1393,7 +1393,7 @@ INNER JOIN t2 c ON c.idContact=cona.idContact
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WHERE cona.postalStripped='T2H3B2'
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 2 1.00
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
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1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
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2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where
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2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00
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@ -1021,7 +1021,7 @@ update t22 set c = '2005-12-08 15:58:27' where a = 255;
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explain select t21.* from t21,t22 where t21.a = t22.a and
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t22.a in (select t12.a from t11, t12 where t11.a in(255,256) and t11.a = t12.a and t11.c is null) and t22.c is null order by t21.a;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 8 Using temporary; Using filesort
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 8 Using temporary; Using filesort
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1 PRIMARY t21 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
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1 PRIMARY t22 ALL NULL NULL NULL NULL 26 Using where; Using join buffer
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2 SUBQUERY t11 ALL NULL NULL NULL NULL 8 Using where
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@ -1039,7 +1039,7 @@ select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) a
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY X ALL NULL NULL NULL NULL 2
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2 DEPENDENT SUBQUERY Y ALL NULL NULL NULL NULL 2 Using where
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2 DEPENDENT SUBQUERY <subquery3> eq_ref unique_key unique_key 5 func 1
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2 DEPENDENT SUBQUERY <subquery3> eq_ref distinct_key distinct_key 5 func 1
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3 SUBQUERY Z ALL NULL NULL NULL NULL 2
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select (select max(Y.a) from t1 Y where a in (select a from t1 Z) and a < X.a) as subq from t1 X;
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subq
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@ -1162,7 +1162,7 @@ create table t3 ( a int , filler char(100), key(a));
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insert into t3 select A.a + 10*B.a, 'filler' from t0 A, t0 B;
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explain select * from t3 where a in (select a from t2) and (a > 5 or a < 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 2
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
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1 PRIMARY t3 ref a a 5 test.t2.a 1 Using join buffer
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 2 Using where
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select * from t3 where a in (select a from t2);
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@ -1211,7 +1211,7 @@ insert into t3 select A.a + 10*B.a, A.a + 10*B.a, 'filler' from t1 A, t1 B, t1 C
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explain select * from t1, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30) and t1.a =3;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 10 Using where
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
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explain select straight_join * from t1 A, t1 B where A.a in (select a from t2);
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@ -1245,14 +1245,14 @@ insert into t0 values(1,1);
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explain select * from t0, t3 where t3.a in (select a from t2) and (t3.a < 10 or t3.a >30);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t0 system NULL NULL NULL NULL 1
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref a a 5 test.t2.a 10 Using join buffer
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 10 Using where
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create table t4 as select a as x, a as y from t1;
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explain select * from t0, t3 where (t3.a, t3.b) in (select x,y from t4) and (t3.a < 10 or t3.a >30);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t0 system NULL NULL NULL NULL 1
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref a a 5 test.t4.x 10 Using where; Using join buffer
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2 SUBQUERY t4 ALL NULL NULL NULL NULL 10 Using where
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drop table t0,t1,t2,t3,t4;
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@ -1278,14 +1278,14 @@ set @@optimizer_switch='firstmatch=off';
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explain select * from t1 where (a,b) in (select a,b from t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 10
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 10 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
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set @save_optimizer_search_depth=@@optimizer_search_depth;
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set @@optimizer_search_depth=63;
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explain select * from t1 where (a,b) in (select a,b from t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 10
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 10 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 100
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set @@optimizer_search_depth=@save_optimizer_search_depth;
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set @@optimizer_switch=default;
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@ -1324,7 +1324,7 @@ insert into t2 select * from t2;
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explain select * from t1 where (a,b,c) in (select X.a, Y.a, Z.a from t2 X, t2 Y, t2 Z where X.b=33);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 15 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 15 func,func,func 1
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2 SUBQUERY X ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY Y ALL NULL NULL NULL NULL 6 Using join buffer
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2 SUBQUERY Z ALL NULL NULL NULL NULL 6 Using join buffer
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@ -1397,7 +1397,7 @@ INNER JOIN t2 c ON c.idContact=cona.idContact
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WHERE cona.postalStripped='T2H3B2'
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);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 2 1.00
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2 100.00
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1 PRIMARY a index PRIMARY PRIMARY 4 NULL 2 100.00 Using where; Using index; Using join buffer
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2 SUBQUERY cona ALL NULL NULL NULL NULL 2 100.00 Using where
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2 SUBQUERY c eq_ref PRIMARY PRIMARY 4 test.cona.idContact 1 100.00 Using join buffer
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@ -216,7 +216,7 @@ FROM t2
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WHERE PTYPE = 'Design'));
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
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@ -231,13 +231,13 @@ WHERE EMPNUM IN
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
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1 SIMPLE <subquery2> eq_ref unique_key unique_key 3 func 1
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1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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DEALLOCATE PREPARE stmt;
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@ -254,7 +254,7 @@ FROM t2
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WHERE PTYPE = 'Design'));
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
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@ -269,13 +269,13 @@ WHERE EMPNUM IN
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL t1_IDX NULL NULL NULL 5
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL t1_IDX NULL NULL NULL 5
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1 SIMPLE <subquery2> eq_ref unique_key unique_key 3 func 1
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1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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DEALLOCATE PREPARE stmt;
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@ -291,7 +291,7 @@ FROM t2
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WHERE PTYPE = 'Design'));
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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PREPARE stmt FROM "EXPLAIN SELECT EMPNAME
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@ -306,13 +306,13 @@ WHERE EMPNUM IN
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 5
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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EXECUTE stmt;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ALL NULL NULL NULL NULL 5
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1 SIMPLE <subquery2> eq_ref unique_key unique_key 3 func 1
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1 SIMPLE <subquery2> eq_ref distinct_key distinct_key 3 func 1
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 Using where
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2 SUBQUERY t3 ALL NULL NULL NULL NULL 12 Using where; Using join buffer
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DEALLOCATE PREPARE stmt;
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@ -1200,7 +1200,7 @@ set @save_optimizer_switch=@@optimizer_switch;
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SET @@optimizer_switch='default,semijoin=on,materialization=on';
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EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 2
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1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
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1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
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2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
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SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
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@ -1224,7 +1224,7 @@ SET @@optimizer_switch='default,semijoin=on,materialization=on';
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EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
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2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR
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SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
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pk
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@ -848,7 +848,7 @@ INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','f
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EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 13 func 1 1.00
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 13 func,func 1 100.00
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2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using MRR
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Warnings:
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Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0))
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@ -1017,7 +1017,7 @@ FROM t1
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WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
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id select_type table type possible_keys key key_len ref rows filtered Extra
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1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
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1 PRIMARY <subquery2> eq_ref unique_key unique_key 8 func 1 1.00
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00
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2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where
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Warnings:
|
||||
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`))
|
||||
|
||||
@ -32,7 +32,7 @@ a b
|
||||
9 5
|
||||
explain select * from t2 where b in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 3
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
|
||||
1 PRIMARY t2 ref b b 5 test.t1.a 2
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
|
||||
select * from t2 where b in (select a from t1);
|
||||
@ -74,7 +74,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
|
||||
from t0 A, t0 B where B.a <5;
|
||||
explain select * from t3 where b in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
|
||||
1 PRIMARY t3 ref b b 5 test.t0.a 1
|
||||
2 SUBQUERY t0 ALL NULL NULL NULL NULL 10
|
||||
set @save_ecp= @@engine_condition_pushdown;
|
||||
@ -101,7 +101,7 @@ set max_heap_table_size= @save_max_heap_table_size;
|
||||
explain select * from t1 where a in (select b from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY t2 index b b 5 NULL 10 Using index
|
||||
select * from t1;
|
||||
a b
|
||||
@ -129,7 +129,7 @@ explain select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
@ -163,7 +163,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
from t2 ot where a in (select a from t1 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 32
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
@ -197,7 +197,7 @@ explain select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
@ -231,7 +231,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
from t2 ot where a in (select a from t1 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 52
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
@ -348,7 +348,7 @@ WHERE t1.Code IN (
|
||||
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
|
||||
2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where
|
||||
SELECT Name FROM t1
|
||||
WHERE t1.Code IN (
|
||||
@ -696,7 +696,7 @@ The following must use loose index scan over t3, key a:
|
||||
explain select count(a) from t2 where a in ( SELECT a FROM t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index a a 5 NULL 1000 Using index
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY t3 index a a 5 NULL 30000 Using index
|
||||
select count(a) from t2 where a in ( SELECT a FROM t3);
|
||||
count(a)
|
||||
|
||||
@ -36,7 +36,7 @@ a b
|
||||
9 5
|
||||
explain select * from t2 where b in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 3
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 3
|
||||
1 PRIMARY t2 ref b b 5 test.t1.a 2 Using join buffer
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 3
|
||||
select * from t2 where b in (select a from t1);
|
||||
@ -78,7 +78,7 @@ A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
|
||||
from t0 A, t0 B where B.a <5;
|
||||
explain select * from t3 where b in (select a from t0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 10
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 10
|
||||
1 PRIMARY t3 ref b b 5 test.t0.a 1 Using join buffer
|
||||
2 SUBQUERY t0 ALL NULL NULL NULL NULL 10
|
||||
set @save_ecp= @@engine_condition_pushdown;
|
||||
@ -105,7 +105,7 @@ set max_heap_table_size= @save_max_heap_table_size;
|
||||
explain select * from t1 where a in (select b from t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY t2 index b b 5 NULL 10 Using index
|
||||
select * from t1;
|
||||
a b
|
||||
@ -133,7 +133,7 @@ explain select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
@ -167,7 +167,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
from t2 ot where a in (select a from t1 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 32
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
@ -201,7 +201,7 @@ explain select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
|
||||
from t1 ot where a in (select a from t2 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 22
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 22
|
||||
select
|
||||
@ -235,7 +235,7 @@ a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
from t2 ot where a in (select a from t1 it);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY ot ALL NULL NULL NULL NULL 22
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY it ALL NULL NULL NULL NULL 52
|
||||
select
|
||||
a, mid(filler1, 1,10), length(filler1)=length(filler2)
|
||||
@ -352,7 +352,7 @@ WHERE t1.Code IN (
|
||||
SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
|
||||
2 SUBQUERY t2 ALL CountryCode NULL NULL NULL 545 Using where
|
||||
SELECT Name FROM t1
|
||||
WHERE t1.Code IN (
|
||||
@ -702,7 +702,7 @@ The following must use loose index scan over t3, key a:
|
||||
explain select count(a) from t2 where a in ( SELECT a FROM t3);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t2 index a a 5 NULL 1000 Using index
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY t3 index a a 5 NULL 30000 Using index
|
||||
select count(a) from t2 where a in ( SELECT a FROM t3);
|
||||
count(a)
|
||||
|
||||
@ -852,7 +852,7 @@ INSERT INTO t2 VALUES (1,'i','iiii','iiii','iiii','iiii','ffff','ffff','ffff','f
|
||||
EXPLAIN EXTENDED SELECT pk FROM t1 WHERE (a, b) IN (SELECT a, b FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 13 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 13 func,func 1 100.00
|
||||
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 100.00 Using index condition; Using MRR
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`pk` AS `pk` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`pk` > 0))
|
||||
@ -1021,7 +1021,7 @@ FROM t1
|
||||
WHERE `varchar_nokey` < 'n' XOR `pk` ) ;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 18 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 8 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func,func 1 100.00
|
||||
2 SUBQUERY t1 ALL varchar_key NULL NULL NULL 15 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t2`.`varchar_nokey` AS `varchar_nokey` from `test`.`t2` semi join (`test`.`t1`) where ((`test`.`t1`.`varchar_nokey` = `test`.`t1`.`varchar_key`) and ((`test`.`t1`.`varchar_nokey` < 'n') xor `test`.`t1`.`pk`))
|
||||
|
||||
@ -39,7 +39,7 @@ explain extended
|
||||
select * from t1 where a1 in (select b1 from t2 where b1 > '0');
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 9 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 9 func 1 100.00
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a1` AS `a1`,`test`.`t1`.`a2` AS `a2` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`b1` > '0'))
|
||||
@ -285,8 +285,8 @@ where (a1, a2) in (select b1, b2 from t2 where b1 > '0') and
|
||||
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery3> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
1 PRIMARY <subquery3> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
||||
3 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
3 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer
|
||||
@ -306,8 +306,8 @@ where (a1, a2) in (select b1, b2 from t2i where b1 > '0') and
|
||||
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1i index it1i1,it1i2,it1i3 # # # 3 100.00 #
|
||||
1 PRIMARY <subquery2> eq_ref unique_key # # # 1 1.00 #
|
||||
1 PRIMARY <subquery3> eq_ref unique_key # # # 1 1.00 #
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key # # # 1 100.00 #
|
||||
1 PRIMARY <subquery3> eq_ref distinct_key # # # 1 100.00 #
|
||||
2 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 #
|
||||
3 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 #
|
||||
3 SUBQUERY t3i index it3i1,it3i2,it3i3 # # # 4 75.00 #
|
||||
@ -329,8 +329,8 @@ b2 in (select c2 from t3 where c2 LIKE '%03')) and
|
||||
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery5> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 5 100.00 Using where
|
||||
5 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
5 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer
|
||||
@ -356,7 +356,7 @@ where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Start temporary
|
||||
1 PRIMARY t2 ALL NULL NULL NULL NULL 5 100.00 Using where; End temporary; Using join buffer
|
||||
1 PRIMARY <subquery5> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery5> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
5 SUBQUERY t3c ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
5 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer
|
||||
4 SUBQUERY t3b ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
@ -395,8 +395,8 @@ id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
4 SUBQUERY t3 ALL NULL # # # 4 100.00 #
|
||||
3 SUBQUERY t3 ALL NULL # # # 4 100.00 #
|
||||
7 UNION t1i index it1i1,it1i2,it1i3 # # # 3 100.00 #
|
||||
7 UNION <subquery8> eq_ref unique_key # # # 1 1.00 #
|
||||
7 UNION <subquery9> eq_ref unique_key # # # 1 1.00 #
|
||||
7 UNION <subquery8> eq_ref distinct_key # # # 1 100.00 #
|
||||
7 UNION <subquery9> eq_ref distinct_key # # # 1 100.00 #
|
||||
8 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 #
|
||||
9 SUBQUERY t2i index it2i1,it2i2,it2i3 # # # 5 100.00 #
|
||||
9 SUBQUERY t3i index it3i1,it3i2,it3i3 # # # 4 75.00 #
|
||||
@ -425,7 +425,7 @@ where (a1, a2) in (select * from t1 where a1 > '0' UNION select * from t2 where
|
||||
where (c1, c2) in (select b1, b2 from t2i where b2 > '0'));
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 PRIMARY <subquery4> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
4 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
@ -449,7 +449,7 @@ a1 = c1;
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
1 PRIMARY t3 ALL NULL NULL NULL NULL 4 100.00 Using where; Using join buffer
|
||||
1 PRIMARY <subquery4> eq_ref unique_key unique_key 18 func 1 1.00
|
||||
1 PRIMARY <subquery4> eq_ref distinct_key distinct_key 18 func,func 1 100.00
|
||||
4 SUBQUERY t3 ALL NULL NULL NULL NULL 4 100.00 Using where
|
||||
4 SUBQUERY t2i index it2i1,it2i2,it2i3 it2i3 18 NULL 5 80.00 Using where; Using index; Using join buffer
|
||||
2 DEPENDENT SUBQUERY t1 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
@ -634,7 +634,7 @@ from t1_16
|
||||
where a1 in (select substring(b1,1,16) from t2_16 where b1 > '0');
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1_16 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 20 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 20 func 1 100.00 Using where
|
||||
2 SUBQUERY t2_16 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select left(`test`.`t1_16`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_16`.`a2`,7) AS `left(a2,7)` from `test`.`t1_16` semi join (`test`.`t2_16`) where ((`test`.`t2_16`.`b1` > '0') and (`test`.`t1_16`.`a1` = substr(`test`.`t2_16`.`b1`,1,16)))
|
||||
@ -749,7 +749,7 @@ from t1_512
|
||||
where a1 in (select substring(b1,1,512) from t2_512 where b1 > '0');
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1_512 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 517 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 517 func 1 100.00 Using where
|
||||
2 SUBQUERY t2_512 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select left(`test`.`t1_512`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_512`.`a2`,7) AS `left(a2,7)` from `test`.`t1_512` semi join (`test`.`t2_512`) where ((`test`.`t2_512`.`b1` > '0') and (`test`.`t1_512`.`a1` = substr(`test`.`t2_512`.`b1`,1,512)))
|
||||
@ -845,7 +845,7 @@ from t1_1024
|
||||
where a1 in (select substring(b1,1,1024) from t2_1024 where b1 > '0');
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1_1024 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 15 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref NULL distinct_key 15 func,func 1 100.00 Using where
|
||||
2 SUBQUERY t2_1024 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select left(`test`.`t1_1024`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1024`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1024` semi join (`test`.`t2_1024`) where ((`test`.`t2_1024`.`b1` > '0') and (`test`.`t1_1024`.`a1` = substr(`test`.`t2_1024`.`b1`,1,1024)))
|
||||
@ -939,7 +939,7 @@ from t1_1025
|
||||
where a1 in (select substring(b1,1,1025) from t2_1025 where b1 > '0');
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1_1025 ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 15 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref NULL distinct_key 15 func,func 1 100.00 Using where
|
||||
2 SUBQUERY t2_1025 ALL NULL NULL NULL NULL 3 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select left(`test`.`t1_1025`.`a1`,7) AS `left(a1,7)`,left(`test`.`t1_1025`.`a2`,7) AS `left(a2,7)` from `test`.`t1_1025` semi join (`test`.`t2_1025`) where ((`test`.`t2_1025`.`b1` > '0') and (`test`.`t1_1025`.`a1` = substr(`test`.`t2_1025`.`b1`,1,1025)))
|
||||
@ -988,7 +988,7 @@ from t1bit
|
||||
where (a1, a2) in (select b1, b2 from t2bit);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1bit ALL NULL NULL NULL NULL 3 100.00
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 10 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 10 func,func 1 100.00
|
||||
2 SUBQUERY t2bit ALL NULL NULL NULL NULL 3 100.00
|
||||
Warnings:
|
||||
Note 1003 select conv(`test`.`t1bit`.`a1`,10,2) AS `bin(a1)`,conv(`test`.`t1bit`.`a2`,10,2) AS `bin(a2)` from `test`.`t1bit` semi join (`test`.`t2bit`) where 1
|
||||
@ -1059,7 +1059,7 @@ insert into t3 values (30);
|
||||
explain extended
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 6 1.00
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6 100.00
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 7 100.00 Using where; Using join buffer
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
Warnings:
|
||||
@ -1074,7 +1074,7 @@ create index it1a on t1(a);
|
||||
explain extended
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 6 1.00
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 6 100.00
|
||||
1 PRIMARY t1 ref it1a it1a 4 test.t2.c 2 100.00 Using index
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 6 100.00 Using where
|
||||
Warnings:
|
||||
@ -1090,7 +1090,7 @@ explain extended
|
||||
select a from t1 where a in (select c from t2 where d >= 20);
|
||||
id select_type table type possible_keys key key_len ref rows filtered Extra
|
||||
1 PRIMARY t1 index it1a it1a 4 NULL 7 100.00 Using index
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 4 func 1 1.00
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1 100.00
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 7 100.00 Using where
|
||||
Warnings:
|
||||
Note 1003 select `test`.`t1`.`a` AS `a` from `test`.`t1` semi join (`test`.`t2`) where ((`test`.`t2`.`d` >= 20))
|
||||
@ -1217,7 +1217,7 @@ insert into t1 values ('aa', 'aaaa');
|
||||
explain select a,b from t1 where b in (select a from t1);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 3 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1 Using where
|
||||
2 SUBQUERY t1 ALL NULL NULL NULL NULL 2
|
||||
select a,b from t1 where b in (select a from t1);
|
||||
a b
|
||||
@ -1238,7 +1238,7 @@ set @save_optimizer_switch=@@optimizer_switch;
|
||||
SET @@optimizer_switch='default,semijoin=on,materialization=on';
|
||||
EXPLAIN SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY <subquery2> ALL unique_key NULL NULL NULL 2
|
||||
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 2
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 3 Using where; Using join buffer
|
||||
2 SUBQUERY t2 ALL NULL NULL NULL NULL 2
|
||||
SELECT COUNT(*) FROM t1 WHERE (f1,f2) IN (SELECT f1,f2 FROM t2);
|
||||
@ -1262,7 +1262,7 @@ SET @@optimizer_switch='default,semijoin=on,materialization=on';
|
||||
EXPLAIN SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 PRIMARY t1 ALL NULL NULL NULL NULL 2
|
||||
1 PRIMARY <subquery2> eq_ref unique_key unique_key 5 func 1
|
||||
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 5 func 1
|
||||
2 SUBQUERY t2 range PRIMARY PRIMARY 4 NULL 2 Using index condition; Using MRR
|
||||
SELECT pk FROM t1 WHERE (a) IN (SELECT a FROM t2 WHERE pk > 0);
|
||||
pk
|
||||
|
||||
@ -2722,6 +2722,16 @@ bool setup_sj_materialization(JOIN_TAB *sjm_tab)
|
||||
cur_ref_buff+= cur_key_part->store_length;
|
||||
}
|
||||
*ref_key= NULL; /* End marker. */
|
||||
|
||||
/*
|
||||
We don't ever have guarded conditions for SJM tables, but code at SQL
|
||||
layer depends on cond_guards array being alloced.
|
||||
*/
|
||||
if (!(tab_ref->cond_guards= (bool**) thd->calloc(sizeof(uint*)*tmp_key_parts)))
|
||||
{
|
||||
DBUG_RETURN(TRUE);
|
||||
}
|
||||
|
||||
tab_ref->key_err= 1;
|
||||
tab_ref->key_parts= tmp_key_parts;
|
||||
sjm->tab_ref= tab_ref;
|
||||
|
||||
@ -6044,12 +6044,15 @@ get_best_combination(JOIN *join)
|
||||
j->use_join_cache= FALSE;
|
||||
j->on_expr_ref= (Item**) &null_ptr;
|
||||
j->cache= NULL;
|
||||
j->keys= key_map(1); // The unique index is always in 'possible keys' in EXPLAIN
|
||||
|
||||
|
||||
/*
|
||||
2. Proceed with processing SJM nest's join tabs, putting them into the
|
||||
sub-order
|
||||
*/
|
||||
SJ_MATERIALIZATION_INFO *sjm= cur_pos->table->emb_sj_nest->sj_mat_info;
|
||||
j->records= j->records_read= sjm->is_sj_scan? sjm->rows : 1;
|
||||
JOIN_TAB *jt= (JOIN_TAB*)join->thd->alloc(sizeof(JOIN_TAB) * sjm->tables);
|
||||
JOIN_TAB_RANGE *jt_range= new JOIN_TAB_RANGE;
|
||||
jt_range->start= jt;
|
||||
@ -18337,6 +18340,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
join->select_lex->type;
|
||||
item_list.push_back(new Item_string(stype, strlen(stype), cs));
|
||||
|
||||
#if 0
|
||||
/*
|
||||
Special processing for SJ-Materialization nests: print the fake table
|
||||
and delay printing of the SJM nest contents until later.
|
||||
@ -18416,6 +18420,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
//i += join->best_positions[i].n_sj_tables-1;
|
||||
goto loop_end;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (tab->type == JT_ALL && tab->select && tab->select->quick)
|
||||
{
|
||||
@ -18437,6 +18442,16 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
table->derived_select_number);
|
||||
item_list.push_back(new Item_string(table_name_buffer, len, cs));
|
||||
}
|
||||
else if (tab->bush_children)
|
||||
{
|
||||
JOIN_TAB *ctab= tab->bush_children->start;
|
||||
/* table */
|
||||
int len= my_snprintf(table_name_buffer,
|
||||
sizeof(table_name_buffer)-1,
|
||||
"<subquery%d>",
|
||||
ctab->emb_sj_nest->sj_subq_pred->get_identifier());
|
||||
item_list.push_back(new Item_string(table_name_buffer, len, cs));
|
||||
}
|
||||
else
|
||||
{
|
||||
TABLE_LIST *real_table= table->pos_in_table_list;
|
||||
@ -18531,7 +18546,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
}
|
||||
else
|
||||
{
|
||||
if (table_list->schema_table &&
|
||||
if (table_list && /* SJM bushes don't have table_list */
|
||||
table_list->schema_table &&
|
||||
table_list->schema_table->i_s_requested_object & OPTIMIZE_I_S_TABLE)
|
||||
{
|
||||
const char *tmp_buff;
|
||||
@ -18562,7 +18578,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
}
|
||||
|
||||
/* Add "rows" field to item_list. */
|
||||
if (table_list->schema_table)
|
||||
if (table_list /* SJM bushes don't have table_list */ &&
|
||||
table_list->schema_table)
|
||||
{
|
||||
/* in_rows */
|
||||
if (join->thd->lex->describe & DESCRIBE_EXTENDED)
|
||||
@ -18570,6 +18587,13 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
/* rows */
|
||||
item_list.push_back(item_null);
|
||||
}
|
||||
// else if (tab->bush_children)
|
||||
// {
|
||||
// /* psergey-todo */
|
||||
// SJ_MATERIALIZATION_INFO *sjm= tab->bush_children->start->emb_sj_nest->sj_mat_info;
|
||||
//
|
||||
// ha_rows rows= is_scan ? ctab->emb_sj_nest->sj_mat_info->rows : 1;
|
||||
// }
|
||||
else
|
||||
{
|
||||
ha_rows examined_rows;
|
||||
@ -18685,7 +18709,8 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
extra.append(STRING_WITH_LEN("; Using where"));
|
||||
}
|
||||
}
|
||||
if (table_list->schema_table &&
|
||||
if (table_list /* SJM bushes don't have table_list */ &&
|
||||
table_list->schema_table &&
|
||||
table_list->schema_table->i_s_requested_object & OPTIMIZE_I_S_TABLE)
|
||||
{
|
||||
if (!table_list->table_open_method)
|
||||
@ -18787,7 +18812,7 @@ static void select_describe(JOIN *join, bool need_tmp_table, bool need_order,
|
||||
}
|
||||
item_list.push_back(new Item_string(str, len, cs));
|
||||
}
|
||||
loop_end:
|
||||
//loop_end:
|
||||
/* psergey2
|
||||
if (i+1 == end_table && sjm_nests_cur != sjm_nests_end)
|
||||
{
|
||||
|
||||
Reference in New Issue
Block a user