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1098 lines
32 KiB
1098 lines
32 KiB
set @subselect_sj2_tmp= @@optimizer_switch;
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set optimizer_switch='semijoin=on,firstmatch=on,loosescan=on';
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set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
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SET optimizer_switch=ifnull(@optimizer_switch_for_subselect_sj2_test,'outer_join_with_cache=off');
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SET optimizer_switch=ifnull(@optimizer_switch_for_subselect_sj2_test,'semijoin_with_cache=off');
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set join_cache_level=1;
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drop table if exists t0, t1, t2, t3, t4, t5;
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drop view if exists v1;
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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 (
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a int,
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b int
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);
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insert into t1 values (1,1),(1,1),(2,2);
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create table t2 (
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a int,
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b int,
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key(b)
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);
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insert into t2 select a, a/2 from t0;
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insert into t2 select a+10, a+10/2 from t0;
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select * from t1;
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a b
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1 1
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1 1
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2 2
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select * from t2;
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a b
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0 0
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1 1
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2 1
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3 2
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4 2
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5 3
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6 3
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7 4
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8 4
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9 5
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10 5
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11 6
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12 7
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13 8
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14 9
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15 10
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16 11
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17 12
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18 13
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19 14
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explain select * from t2 where b in (select a from t1);
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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 distinct_key NULL NULL NULL 3
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1 PRIMARY t2 ref b b 5 test.t1.a 2
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2 MATERIALIZED t1 ALL NULL NULL NULL NULL 3 Using where
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select * from t2 where b in (select a from t1);
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a b
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1 1
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2 1
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3 2
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4 2
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create table t3 (
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a int,
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b int,
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key(b),
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pk1 char(200), pk2 char(200), pk3 char(200),
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primary key(pk1, pk2, pk3)
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) engine=innodb;
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insert into t3 select a,a, a,a,a from t0;
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insert into t3 select a,a, a+100,a+100,a+100 from t0;
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explain select * from t3 where b in (select a from t1);
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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 distinct_key NULL NULL NULL 3
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1 PRIMARY t3 ref b b 5 test.t1.a 1
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2 MATERIALIZED t1 ALL NULL NULL NULL NULL 3 Using where
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select * from t3 where b in (select a from t1);
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a b pk1 pk2 pk3
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1 1 1 1 1
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1 1 101 101 101
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2 2 102 102 102
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2 2 2 2 2
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set @save_max_heap_table_size= @@max_heap_table_size;
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set max_heap_table_size=16384;
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set @save_join_buffer_size = @@join_buffer_size;
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set join_buffer_size= 8192;
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drop table t3;
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create table t3 (
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a int,
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b int,
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key(b),
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pk1 char(200), pk2 char(200),
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primary key(pk1, pk2)
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) engine=innodb;
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insert into t3 select
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A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a, A.a + 10*B.a
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from t0 A, t0 B where B.a <5;
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explain select * from t3 where b in (select a from t0);
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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 distinct_key NULL NULL NULL 10
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1 PRIMARY t3 ref b b 5 test.t0.a 1
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2 MATERIALIZED t0 ALL NULL NULL NULL NULL 10 Using where
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select * from t3 where b in (select A.a+B.a from t0 A, t0 B where B.a<5);
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a b pk1 pk2
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0 0 0 0
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1 1 1 1
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2 2 2 2
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3 3 3 3
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4 4 4 4
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5 5 5 5
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6 6 6 6
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7 7 7 7
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8 8 8 8
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9 9 9 9
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10 10 10 10
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11 11 11 11
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12 12 12 12
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13 13 13 13
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set join_buffer_size= @save_join_buffer_size;
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set max_heap_table_size= @save_max_heap_table_size;
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explain select * from t1 where a in (select 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 3 Using where
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1 PRIMARY t2 ref b b 5 test.t1.a 2 Using index; FirstMatch(t1)
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select * from t1;
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a b
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1 1
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1 1
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2 2
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select * from t1 where a in (select b from t2);
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a b
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1 1
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1 1
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2 2
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drop table t1, t2, t3;
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set @save_join_buffer_size = @@join_buffer_size;
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set join_buffer_size= 8192;
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create table t1 (a int, filler1 binary(200), filler2 binary(200));
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insert into t1 select a, 'filler123456', 'filler123456' from t0;
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insert into t1 select a+10, 'filler123456', 'filler123456' from t0;
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create table t2 as select * from t1;
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insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
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insert into t1 values (2, 'duplicate ok', 'duplicate ok');
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insert into t1 values (18, 'duplicate ok', 'duplicate ok');
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insert into t2 values (3, 'duplicate ok', 'duplicate ok');
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insert into t2 values (19, 'duplicate ok', 'duplicate ok');
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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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 distinct_key NULL NULL NULL 22
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1 PRIMARY ot ALL NULL NULL NULL NULL 32 Using where; Using join buffer (flat, BNL join)
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2 MATERIALIZED it ALL NULL NULL NULL NULL 22
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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a mid(filler1, 1,10) Z
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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3 filler1234 1
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
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7 filler1234 1
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8 filler1234 1
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9 filler1234 1
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10 filler1234 1
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11 filler1234 1
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12 filler1234 1
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13 filler1234 1
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14 filler1234 1
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15 filler1234 1
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16 filler1234 1
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17 filler1234 1
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18 filler1234 1
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19 filler1234 1
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2 duplicate 1
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18 duplicate 1
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
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from t2 ot where a in (select a from t1 it);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY ot ALL NULL NULL NULL NULL 22
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
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2 MATERIALIZED it ALL NULL NULL NULL NULL 32
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
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from t2 ot where a in (select a from t1 it);
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a mid(filler1, 1,10) length(filler1)=length(filler2)
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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3 filler1234 1
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
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7 filler1234 1
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8 filler1234 1
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9 filler1234 1
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10 filler1234 1
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11 filler1234 1
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12 filler1234 1
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13 filler1234 1
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14 filler1234 1
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15 filler1234 1
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16 filler1234 1
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17 filler1234 1
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18 filler1234 1
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19 filler1234 1
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3 duplicate 1
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19 duplicate 1
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insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
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insert into t1 select a+20, 'filler123456', 'filler123456' from t0;
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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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 distinct_key NULL NULL NULL 22
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1 PRIMARY ot ALL NULL NULL NULL NULL 52 Using where; Using join buffer (flat, BNL join)
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2 MATERIALIZED it ALL NULL NULL NULL NULL 22
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2) as Z
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from t1 ot where a in (select a from t2 it);
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a mid(filler1, 1,10) Z
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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3 filler1234 1
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
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7 filler1234 1
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8 filler1234 1
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9 filler1234 1
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10 filler1234 1
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11 filler1234 1
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12 filler1234 1
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13 filler1234 1
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14 filler1234 1
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15 filler1234 1
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16 filler1234 1
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17 filler1234 1
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18 filler1234 1
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19 filler1234 1
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2 duplicate 1
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18 duplicate 1
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explain select
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
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from t2 ot where a in (select a from t1 it);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY ot ALL NULL NULL NULL NULL 22
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
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2 MATERIALIZED it ALL NULL NULL NULL NULL 52
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select
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a, mid(filler1, 1,10), length(filler1)=length(filler2)
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from t2 ot where a in (select a from t1 it);
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a mid(filler1, 1,10) length(filler1)=length(filler2)
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0 filler1234 1
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1 filler1234 1
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2 filler1234 1
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3 filler1234 1
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4 filler1234 1
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5 filler1234 1
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6 filler1234 1
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7 filler1234 1
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8 filler1234 1
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9 filler1234 1
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10 filler1234 1
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11 filler1234 1
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12 filler1234 1
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13 filler1234 1
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14 filler1234 1
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15 filler1234 1
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16 filler1234 1
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17 filler1234 1
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18 filler1234 1
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19 filler1234 1
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3 duplicate 1
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19 duplicate 1
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drop table t1, t2;
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create table t1 (a int, b int, key(a));
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create table t2 (a int, b int, key(a));
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create table t3 (a int, b int, key(a));
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insert into t1 select a,a from t0;
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insert into t2 select a,a from t0;
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insert into t3 select a,a from t0;
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t2 and t3 must be use 'ref', not 'ALL':
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explain select *
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from t0 where a in
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(select t2.a+t3.a from t1 left join (t2 join t3) on t2.a=t1.a and t3.a=t1.a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t0 ALL NULL NULL NULL NULL 10
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 8 func 1 Using where
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2 MATERIALIZED t1 index a a 5 NULL 10 Using where; Using index
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2 MATERIALIZED t2 ref a a 5 test.t1.a 1 Using index
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2 MATERIALIZED t3 ref a a 5 test.t1.a 1 Using index
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drop table t0, t1,t2,t3;
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CREATE TABLE t1 (
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ID int(11) NOT NULL auto_increment,
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Name char(35) NOT NULL default '',
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Country char(3) NOT NULL default '',
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Population int(11) NOT NULL default '0',
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PRIMARY KEY (ID),
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INDEX (Population),
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INDEX (Country)
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);
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CREATE TABLE t2 (
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Code char(3) NOT NULL default '',
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Name char(52) NOT NULL default '',
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SurfaceArea float(10,2) NOT NULL default '0.00',
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Population int(11) NOT NULL default '0',
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Capital int(11) default NULL,
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PRIMARY KEY (Code),
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UNIQUE INDEX (Name),
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INDEX (Population)
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);
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CREATE TABLE t3 (
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Country char(3) NOT NULL default '',
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Language char(30) NOT NULL default '',
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Percentage float(3,1) NOT NULL default '0.0',
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PRIMARY KEY (Country, Language),
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INDEX (Percentage)
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);
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set @bug35674_save_optimizer_switch=@@optimizer_switch;
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set optimizer_switch='materialization=off';
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EXPLAIN
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SELECT Name FROM t2
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WHERE t2.Code IN (SELECT Country FROM t1 WHERE Population > 5000000)
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AND
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t2.Code IN (SELECT Country FROM t3
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WHERE Language='English' AND Percentage > 10 AND
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t2.Population > 100000);
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id select_type table type possible_keys key key_len ref rows Extra
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1 PRIMARY t1 range Population,Country Population 4 NULL 1 Using index condition; Rowid-ordered scan; Start temporary
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1 PRIMARY t2 eq_ref PRIMARY,Population PRIMARY 3 test.t1.Country 1 Using where; End temporary
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1 PRIMARY t3 eq_ref PRIMARY,Percentage PRIMARY 33 test.t1.Country,const 1 Using index condition; Using where
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set optimizer_switch=@bug35674_save_optimizer_switch;
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DROP TABLE t1,t2,t3;
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CREATE TABLE t1 (
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Code char(3) NOT NULL DEFAULT '',
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Name char(52) NOT NULL DEFAULT '',
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Continent enum('Asia','Europe','North America','Africa','Oceania','Antarctica','South America') NOT NULL DEFAULT 'Asia',
|
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Region char(26) NOT NULL DEFAULT '',
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SurfaceArea float(10,2) NOT NULL DEFAULT '0.00',
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IndepYear smallint(6) DEFAULT NULL,
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Population int(11) NOT NULL DEFAULT '0',
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LifeExpectancy float(3,1) DEFAULT NULL,
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GNP float(10,2) DEFAULT NULL,
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GNPOld float(10,2) DEFAULT NULL,
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LocalName char(45) NOT NULL DEFAULT '',
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GovernmentForm char(45) NOT NULL DEFAULT '',
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HeadOfState char(60) DEFAULT NULL,
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Capital int(11) DEFAULT NULL,
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Code2 char(2) NOT NULL DEFAULT '',
|
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PRIMARY KEY (Code)
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);
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CREATE TABLE t2 (
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ID int(11) NOT NULL AUTO_INCREMENT,
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Name char(35) NOT NULL DEFAULT '',
|
|
CountryCode char(3) NOT NULL DEFAULT '',
|
|
District char(20) NOT NULL DEFAULT '',
|
|
Population int(11) NOT NULL DEFAULT '0',
|
|
PRIMARY KEY (ID),
|
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KEY CountryCode (CountryCode)
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|
);
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Fill the table with test data
|
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This must not use LooseScan:
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EXPLAIN SELECT Name FROM t1
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WHERE t1.Code IN (
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SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
|
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id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL PRIMARY NULL NULL NULL 31
|
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1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 3 func 1
|
|
2 MATERIALIZED t2 ALL CountryCode NULL NULL NULL 545 Using where
|
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SELECT Name FROM t1
|
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WHERE t1.Code IN (
|
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SELECT t2.CountryCode FROM t2 WHERE Population > 5000000);
|
|
Name
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Austria
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Canada
|
|
China
|
|
Czech Republic
|
|
drop table t1, t2;
|
|
drop procedure if exists p1;
|
|
drop procedure if exists p2;
|
|
drop procedure if exists p3;
|
|
drop procedure if exists p4;
|
|
CREATE TABLE t1(a INT);
|
|
CREATE TABLE t2(c INT);
|
|
CREATE PROCEDURE p1(v1 int)
|
|
BEGIN
|
|
SELECT 1 FROM t1 WHERE a = v1 AND a IN (SELECT c FROM t2);
|
|
END
|
|
//
|
|
CREATE PROCEDURE p2(v1 int)
|
|
BEGIN
|
|
SELECT 1 FROM t1 WHERE a IN (SELECT c FROM t2);
|
|
END
|
|
//
|
|
CREATE PROCEDURE p3(v1 int)
|
|
BEGIN
|
|
SELECT 1
|
|
FROM
|
|
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
|
|
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
|
|
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
|
|
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
|
|
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
|
|
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
|
|
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
|
|
t1 t57,t1 t58,t1 t59,t1 t60
|
|
WHERE t01.a IN (SELECT c FROM t2);
|
|
END
|
|
//
|
|
CREATE PROCEDURE p4(v1 int)
|
|
BEGIN
|
|
SELECT 1
|
|
FROM
|
|
t1 t01,t1 t02,t1 t03,t1 t04,t1 t05,t1 t06,t1 t07,t1 t08,
|
|
t1 t09,t1 t10,t1 t11,t1 t12,t1 t13,t1 t14,t1 t15,t1 t16,
|
|
t1 t17,t1 t18,t1 t19,t1 t20,t1 t21,t1 t22,t1 t23,t1 t24,
|
|
t1 t25,t1 t26,t1 t27,t1 t28,t1 t29,t1 t30,t1 t31,t1 t32,
|
|
t1 t33,t1 t34,t1 t35,t1 t36,t1 t37,t1 t38,t1 t39,t1 t40,
|
|
t1 t41,t1 t42,t1 t43,t1 t44,t1 t45,t1 t46,t1 t47,t1 t48,
|
|
t1 t49,t1 t50,t1 t51,t1 t52,t1 t53,t1 t54,t1 t55,t1 t56,
|
|
t1 t57,t1 t58,t1 t59,t1 t60
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|
WHERE t01.a = v1 AND t01.a IN (SELECT c FROM t2);
|
|
END
|
|
//
|
|
CALL p1(1);
|
|
1
|
|
CALL p2(1);
|
|
1
|
|
CALL p3(1);
|
|
1
|
|
CALL p4(1);
|
|
1
|
|
DROP TABLE t1, t2;
|
|
DROP PROCEDURE p1;
|
|
DROP PROCEDURE p2;
|
|
DROP PROCEDURE p3;
|
|
DROP PROCEDURE p4;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4);
|
|
create table t1 (a int, b int, key(a));
|
|
insert into t1 select a,a from t0;
|
|
insert into t1 select a+5,a from t0;
|
|
create table t2 (a int, b int, primary key(a));
|
|
insert into t2 select * from t1;
|
|
Table t2, unlike table t1, should be displayed as pulled out
|
|
explain extended select * from t0
|
|
where t0.a in ( select t1.a from t1,t2 where t2.a=t0.a and
|
|
t1.b=t2.b);
|
|
id select_type table type possible_keys key key_len ref rows filtered Extra
|
|
1 PRIMARY t0 ALL NULL NULL NULL NULL 5 100.00 Using where
|
|
1 PRIMARY t2 eq_ref PRIMARY PRIMARY 4 test.t0.a 1 100.00
|
|
1 PRIMARY t1 ref a a 5 test.t0.a 1 100.00 Using where; FirstMatch(t2)
|
|
Warnings:
|
|
Note 1276 Field or reference 'test.t0.a' of SELECT #2 was resolved in SELECT #1
|
|
Note 1003 select `test`.`t0`.`a` AS `a` from `test`.`t2` semi join (`test`.`t1`) join `test`.`t0` where ((`test`.`t1`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`a` = `test`.`t0`.`a`) and (`test`.`t1`.`a` = `test`.`t0`.`a`))
|
|
update t1 set a=3, b=11 where a=4;
|
|
update t2 set b=11 where a=3;
|
|
select * from t0 where t0.a in
|
|
(select t1.a from t1, t2 where t2.a=t0.a and t1.b=t2.b);
|
|
a
|
|
0
|
|
1
|
|
2
|
|
3
|
|
drop table t0, t1, t2;
|
|
CREATE TABLE t1 (
|
|
id int(11) NOT NULL,
|
|
PRIMARY KEY (id));
|
|
CREATE TABLE t2 (
|
|
id int(11) NOT NULL,
|
|
fid int(11) NOT NULL,
|
|
PRIMARY KEY (id));
|
|
insert into t1 values(1);
|
|
insert into t2 values(1,7503),(2,1);
|
|
explain select count(*)
|
|
from t1
|
|
where fid IN (select fid from t2 where (id between 7502 and 8420) order by fid );
|
|
ERROR 42S22: Unknown column 'fid' in 'IN/ALL/ANY subquery'
|
|
drop table t1, t2;
|
|
create table t1 (a int, b int, key (a), key (b));
|
|
insert into t1 values (2,4),(2,4),(2,4);
|
|
select t1.a from t1
|
|
where
|
|
t1.a in (select 1 from t1 where t1.a in (select 1 from t1) group by t1.a);
|
|
a
|
|
drop table t1;
|
|
create table t1(a int,b int,key(a),key(b));
|
|
insert into t1 values (1,1),(2,2),(3,3);
|
|
select 1 from t1
|
|
where t1.a not in (select 1 from t1
|
|
where t1.a in (select 1 from t1)
|
|
group by t1.b);
|
|
1
|
|
1
|
|
1
|
|
drop table t1;
|
|
CREATE TABLE t1
|
|
(EMPNUM CHAR(3) NOT NULL,
|
|
EMPNAME CHAR(20),
|
|
GRADE DECIMAL(4),
|
|
CITY CHAR(15));
|
|
CREATE TABLE t2
|
|
(PNUM CHAR(3) NOT NULL,
|
|
PNAME CHAR(20),
|
|
PTYPE CHAR(6),
|
|
BUDGET DECIMAL(9),
|
|
CITY CHAR(15));
|
|
CREATE TABLE t3
|
|
(EMPNUM CHAR(3) NOT NULL,
|
|
PNUM CHAR(3) NOT NULL,
|
|
HOURS DECIMAL(5));
|
|
INSERT INTO t1 VALUES ('E1','Alice',12,'Deale');
|
|
INSERT INTO t1 VALUES ('E2','Betty',10,'Vienna');
|
|
INSERT INTO t1 VALUES ('E3','Carmen',13,'Vienna');
|
|
INSERT INTO t1 VALUES ('E4','Don',12,'Deale');
|
|
INSERT INTO t1 VALUES ('E5','Ed',13,'Akron');
|
|
INSERT INTO t2 VALUES ('P1','MXSS','Design',10000,'Deale');
|
|
INSERT INTO t2 VALUES ('P2','CALM','Code',30000,'Vienna');
|
|
INSERT INTO t2 VALUES ('P3','SDP','Test',30000,'Tampa');
|
|
INSERT INTO t2 VALUES ('P4','SDP','Design',20000,'Deale');
|
|
INSERT INTO t2 VALUES ('P5','IRM','Test',10000,'Vienna');
|
|
INSERT INTO t2 VALUES ('P6','PAYR','Design',50000,'Deale');
|
|
INSERT INTO t3 VALUES ('E1','P1',40);
|
|
INSERT INTO t3 VALUES ('E1','P2',20);
|
|
INSERT INTO t3 VALUES ('E1','P3',80);
|
|
INSERT INTO t3 VALUES ('E1','P4',20);
|
|
INSERT INTO t3 VALUES ('E1','P5',12);
|
|
INSERT INTO t3 VALUES ('E1','P6',12);
|
|
INSERT INTO t3 VALUES ('E2','P1',40);
|
|
INSERT INTO t3 VALUES ('E2','P2',80);
|
|
INSERT INTO t3 VALUES ('E3','P2',20);
|
|
INSERT INTO t3 VALUES ('E4','P2',20);
|
|
INSERT INTO t3 VALUES ('E4','P4',40);
|
|
INSERT INTO t3 VALUES ('E4','P5',80);
|
|
SELECT * FROM t1;
|
|
EMPNUM EMPNAME GRADE CITY
|
|
E1 Alice 12 Deale
|
|
E2 Betty 10 Vienna
|
|
E3 Carmen 13 Vienna
|
|
E4 Don 12 Deale
|
|
E5 Ed 13 Akron
|
|
CREATE UNIQUE INDEX t1_IDX ON t1(EMPNUM);
|
|
SELECT EMPNAME
|
|
FROM t1
|
|
WHERE EMPNUM IN
|
|
(SELECT EMPNUM
|
|
FROM t3
|
|
WHERE PNUM IN
|
|
(SELECT PNUM
|
|
FROM t2
|
|
WHERE PTYPE = 'Design'));
|
|
EMPNAME
|
|
Alice
|
|
Betty
|
|
Don
|
|
DROP INDEX t1_IDX ON t1;
|
|
CREATE INDEX t1_IDX ON t1(EMPNUM);
|
|
SELECT EMPNAME
|
|
FROM t1
|
|
WHERE EMPNUM IN
|
|
(SELECT EMPNUM
|
|
FROM t3
|
|
WHERE PNUM IN
|
|
(SELECT PNUM
|
|
FROM t2
|
|
WHERE PTYPE = 'Design'));
|
|
EMPNAME
|
|
Alice
|
|
Betty
|
|
Don
|
|
DROP INDEX t1_IDX ON t1;
|
|
SELECT EMPNAME
|
|
FROM t1
|
|
WHERE EMPNUM IN
|
|
(SELECT EMPNUM
|
|
FROM t3
|
|
WHERE PNUM IN
|
|
(SELECT PNUM
|
|
FROM t2
|
|
WHERE PTYPE = 'Design'));
|
|
EMPNAME
|
|
Alice
|
|
Betty
|
|
Don
|
|
DROP TABLE t1, t2, t3;
|
|
CREATE TABLE t1 (f1 INT NOT NULL);
|
|
CREATE VIEW v1 (a) AS SELECT f1 IN (SELECT f1 FROM t1) FROM t1;
|
|
SELECT * FROM v1;
|
|
a
|
|
drop view v1;
|
|
drop table t1;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1(a int, b int);
|
|
insert into t1 values (0,0),(1,1),(2,2);
|
|
create table t2 as select * from t1;
|
|
create table t3 (pk int, a int, primary key(pk));
|
|
insert into t3 select a,a from t0;
|
|
explain
|
|
select * from t1 left join t2 on (t2.a= t1.a and t2.a in (select pk from t3));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL NULL NULL NULL NULL 3
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 3 Using where
|
|
2 MATERIALIZED t3 index PRIMARY PRIMARY 4 NULL 10 Using index
|
|
drop table t0, t1, t2, t3;
|
|
create table t1 (a int);
|
|
insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t2 (a char(200), b char(200), c char(200), primary key (a,b,c)) engine=innodb;
|
|
insert into t2 select concat(a, repeat('X',198)),repeat('B',200),repeat('B',200) from t1;
|
|
insert into t2 select concat(a, repeat('Y',198)),repeat('B',200),repeat('B',200) from t1;
|
|
alter table t2 add filler1 int;
|
|
insert into t1 select A.a + 10*(B.a + 10*C.a) from t1 A, t1 B, t1 C;
|
|
set @save_join_buffer_size=@@join_buffer_size;
|
|
set join_buffer_size=1;
|
|
select * from t2 where filler1 in ( select a from t1);
|
|
a b c filler1
|
|
set join_buffer_size=default;
|
|
drop table t1, t2;
|
|
create table t1 (a int not null);
|
|
drop procedure if exists p1;
|
|
CREATE PROCEDURE p1()
|
|
BEGIN
|
|
DECLARE EXIT HANDLER FOR SQLEXCEPTION select a from t1;
|
|
prepare s1 from '
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in (
|
|
select a from t1 where a in ( select a from t1)
|
|
)))))))))))))))))))))))))))))))))))))))))))))))))))))))))))))';
|
|
execute s1;
|
|
END;
|
|
|
|
|
call p1();
|
|
a
|
|
drop procedure p1;
|
|
drop table t1;
|
|
create table t0 (a int);
|
|
insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
|
|
create table t1 (a int) as select A.a + 10 *(B.a + 10*C.a) as a from t0 A, t0 B, t0 C;
|
|
create table t2 (id int, a int, primary key(id), key(a)) as select a as id, a as a from t1;
|
|
show create table t2;
|
|
Table Create Table
|
|
t2 CREATE TABLE `t2` (
|
|
`id` int(11) NOT NULL DEFAULT '0',
|
|
`a` int(11) DEFAULT NULL,
|
|
PRIMARY KEY (`id`),
|
|
KEY `a` (`a`)
|
|
) ENGINE=MyISAM DEFAULT CHARSET=latin1
|
|
set @a=0;
|
|
create table t3 as select * from t2 limit 0;
|
|
insert into t3 select @a:=@a+1, t2.a from t2, t0;
|
|
insert into t3 select @a:=@a+1, t2.a from t2, t0;
|
|
insert into t3 select @a:=@a+1, t2.a from t2, t0;
|
|
alter table t3 add primary key(id), add key(a);
|
|
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 distinct_key distinct_key 4 func 1
|
|
2 MATERIALIZED t3 index a a 5 NULL 30000 Using index
|
|
select count(a) from t2 where a in ( SELECT a FROM t3);
|
|
count(a)
|
|
1000
|
|
drop table t0,t1,t2,t3;
|
|
|
|
BUG#42740: crash in optimize_semijoin_nests
|
|
|
|
create table t1 (c6 timestamp,key (c6)) engine=innodb;
|
|
create table t2 (c2 double) engine=innodb;
|
|
explain select 1 from t2 where c2 = any (select log10(null) from t1 where c6 <null) ;
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY NULL NULL NULL NULL NULL NULL NULL Impossible WHERE noticed after reading const tables
|
|
drop table t1, t2;
|
|
#
|
|
# BUG#42742: crash in setup_sj_materialization, Copy_field::set
|
|
#
|
|
create table t3 ( c1 year) engine=innodb;
|
|
insert into t3 values (2135),(2142);
|
|
create table t2 (c1 tinytext,c2 text,c6 timestamp) engine=innodb;
|
|
# The following must not crash, EXPLAIN should show one SJ strategy, not a mix:
|
|
explain select 1 from t2 where
|
|
c2 in (select 1 from t3, t2) and
|
|
c1 in (select convert(c6,char(1)) from t2);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 2 FirstMatch(t2)
|
|
drop table t2, t3;
|
|
#
|
|
# BUG#761598: InnoDB: Error: row_search_for_mysql() is called without ha_innobase::external_lock() in maria-5.3
|
|
#
|
|
CREATE TABLE t1 ( f1 int NOT NULL , f10 int) ;
|
|
INSERT IGNORE INTO t1 VALUES (25,0),(29,0);
|
|
CREATE TABLE t2 ( f10 int) ENGINE=InnoDB;
|
|
CREATE TABLE t3 ( f11 int) ;
|
|
INSERT IGNORE INTO t3 VALUES (0);
|
|
SELECT alias1.f10 AS field2
|
|
FROM t2 AS alias1
|
|
JOIN (
|
|
t3 AS alias2
|
|
JOIN t1 AS alias3
|
|
ON alias3.f10
|
|
) ON alias3.f1
|
|
WHERE alias2.f11 IN (
|
|
SELECT SQ4_alias1.f10
|
|
FROM t1 AS SQ4_alias1
|
|
LEFT JOIN t2 AS SQ4_alias3 ON SQ4_alias3.f10
|
|
)
|
|
GROUP BY field2;
|
|
field2
|
|
drop table t1, t2, t3;
|
|
#
|
|
# BUG#849763: Wrong result with second execution of prepared statement with semijoin + view
|
|
#
|
|
CREATE TABLE t1 ( c varchar(1)) engine=innodb;
|
|
INSERT INTO t1 VALUES ('r');
|
|
CREATE TABLE t2 ( a integer, b varchar(1), c varchar(1)) engine=innodb;
|
|
INSERT INTO t2 VALUES (1,'r','r');
|
|
CREATE OR REPLACE VIEW v1 AS SELECT * FROM t1;
|
|
PREPARE st1 FROM 'SELECT * FROM t2 WHERE a = SOME (SELECT a FROM v1 WHERE v1.c = t2.c)';
|
|
EXECUTE st1;
|
|
a b c
|
|
1 r r
|
|
EXECUTE st1;
|
|
a b c
|
|
1 r r
|
|
DROP VIEW v1;
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# BUG#858732: Wrong result with semijoin + loosescan + comma join
|
|
#
|
|
CREATE TABLE t1 (f13 int(11) NOT NULL , PRIMARY KEY (f13)) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES (16),(24);
|
|
CREATE TABLE t2 (f14 int(11) NOT NULL, f12 varchar(1) NOT NULL, KEY (f12,f14)) ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES (6,'y');
|
|
CREATE TABLE t3 (f12 varchar(1) NOT NULL) ENGINE=InnoDB;
|
|
INSERT INTO t3 VALUES ('r'),('s'),('t'),('v'),('w'),('x'),('y');
|
|
# The following must use LooseScan but not join buffering
|
|
explain
|
|
SELECT * FROM t3
|
|
WHERE f12 IN (SELECT alias2.f12 FROM t1 AS alias1, t2 AS alias2, t1 WHERE alias1.f13 = 24);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY alias1 const PRIMARY PRIMARY 4 const 1 Using index
|
|
1 PRIMARY alias2 index f12 f12 7 NULL 1 Using index; LooseScan
|
|
1 PRIMARY t1 index NULL PRIMARY 4 NULL 2 Using index; FirstMatch(alias2)
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 7 Using where; Using join buffer (flat, BNL join)
|
|
SELECT * FROM t3
|
|
WHERE f12 IN (SELECT alias2.f12 FROM t1 AS alias1, t2 AS alias2, t1 WHERE alias1.f13 = 24);
|
|
f12
|
|
y
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# BUG#869012: Wrong result with semijoin + materialization + AND in WHERE
|
|
#
|
|
CREATE TABLE t1 (f3 varchar(1) , f4 varchar(1) ) engine=InnoDB;
|
|
INSERT IGNORE INTO t1 VALUES ('x','x'),('x','x');
|
|
CREATE TABLE t2 ( f4 varchar(1) ) ;
|
|
INSERT IGNORE INTO t2 VALUES ('g');
|
|
CREATE TABLE t3 (f4 varchar(1) ) Engine=InnoDB;
|
|
INSERT IGNORE INTO t3 VALUES ('x');
|
|
set @tmp_869012=@@optimizer_switch;
|
|
SET optimizer_switch='semijoin=on,materialization=on';
|
|
SELECT *
|
|
FROM t1 , t2
|
|
WHERE ( t1.f4 ) IN ( SELECT f4 FROM t3 )
|
|
AND t2.f4 != t1.f3 ;
|
|
f3 f4 f4
|
|
x x g
|
|
x x g
|
|
set optimizer_switch= @tmp_869012;
|
|
DROP TABLE t1,t2,t3;
|
|
#
|
|
# BUG#869001: Wrong result with semijoin + materialization + firstmatch + multipart key
|
|
#
|
|
set @tmp869001_jcl= @@join_cache_level;
|
|
set @tmp869001_os= @@optimizer_switch;
|
|
SET join_cache_level=0;
|
|
SET optimizer_switch='materialization=on,semijoin=on,firstmatch=on,loosescan=off';
|
|
CREATE TABLE t1 ( f2 int, f3 varchar(1), KEY (f3,f2)) engine=innodb;
|
|
INSERT INTO t1 VALUES (8,'x'),(NULL,'x'),(8,'c');
|
|
CREATE TABLE t2 ( f4 varchar(1)) engine=innodb;
|
|
INSERT INTO t2 VALUES ('x');
|
|
CREATE TABLE t3 ( f1 int) engine=innodb;
|
|
INSERT INTO t3 VALUES (8),(6),(2),(9),(6);
|
|
CREATE TABLE t4 ( f3 varchar(1)) engine=innodb;
|
|
INSERT INTO t4 VALUES ('p'),('j'),('c');
|
|
SELECT *
|
|
FROM t1 JOIN t2 ON (t2.f4 = t1.f3 )
|
|
WHERE ( 8 ) IN (
|
|
SELECT t3.f1 FROM t3 , t4
|
|
);
|
|
f2 f3 f4
|
|
NULL x x
|
|
8 x x
|
|
DROP TABLE t1, t2, t3, t4;
|
|
set join_cache_level= @tmp869001_jcl;
|
|
set optimizer_switch= @tmp869001_os;
|
|
#
|
|
# Bug #881318: join cache + duplicate elimination + left join
|
|
# with empty materialized derived inner table
|
|
#
|
|
CREATE TABLE t1 (b varchar(1)) ENGINE=InnoDB;
|
|
CREATE TABLE t2 (a varchar(1)) ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES ('a');
|
|
CREATE TABLE t3 (a varchar(1), b varchar(1)) ENGINE=InnoDB;
|
|
INSERT INTO t3 VALUES ('c','c');
|
|
CREATE TABLE t4 (b varchar(1)) ENGINE=InnoDB;
|
|
INSERT INTO t4 VALUES ('c'), ('b');
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
EXPLAIN
|
|
SELECT * FROM t3 LEFT JOIN (v1,t2) ON t3.a = t2.a
|
|
WHERE t3.b IN (SELECT b FROM t4);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t3 ALL NULL NULL NULL NULL 1
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
|
|
1 PRIMARY t2 ALL NULL NULL NULL NULL 1 Using where
|
|
1 PRIMARY <derived3> ALL NULL NULL NULL NULL 2
|
|
2 MATERIALIZED t4 ALL NULL NULL NULL NULL 2
|
|
3 DERIVED t1 ALL NULL NULL NULL NULL 1
|
|
SELECT * FROM t3 LEFT JOIN (v1,t2) ON t3.a = t2.a
|
|
WHERE t3.b IN (SELECT b FROM t4);
|
|
a b b a
|
|
c c NULL NULL
|
|
DROP VIEW v1;
|
|
DROP TABLE t1,t2,t3,t4;
|
|
#
|
|
# BUG#912538: Wrong result (missing rows) with semijoin=on, firstmatch=on, ...
|
|
#
|
|
CREATE TABLE t1 ( a INT NOT NULL, UNIQUE KEY(a) );
|
|
INSERT INTO t1 VALUES (1),(2),(3),(4);
|
|
CREATE TABLE t2 ( b INT, c INT ) ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES (1,1);
|
|
SELECT * FROM t1, t2 WHERE c IN (SELECT c FROM t1, t2 WHERE a = b);
|
|
a b c
|
|
1 1 1
|
|
2 1 1
|
|
3 1 1
|
|
4 1 1
|
|
DROP TABLE t1,t2;
|
|
#
|
|
# BUG#962667: Assertion `0' failed in QUICK_INDEX_SORT_SELECT::need_sorted_output()
|
|
# with index_merge+index_merge_sort_union+loosescan+semijoin
|
|
#
|
|
CREATE TABLE t1 (
|
|
a INT, b VARCHAR(1), c INT,
|
|
KEY(a), KEY(b)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES
|
|
(1,'v',9),(2,'v',8),(3,'c',7),(4,'m',6),(5,'x',5),
|
|
(6,'i',4),(7,'e',3),(8,'p',2),(9,'s',1),(10,'j',9),
|
|
(11,'z',8),(12,'c',7),(13,'a',6),(14,'q',5),(15,'y',4),
|
|
(16,'n',3),(17,'r',2),(18,'v',1),(19,'p',0);
|
|
CREATE TABLE t2 (
|
|
pk INT, d VARCHAR(1), e INT,
|
|
PRIMARY KEY(pk), KEY(d,e)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES
|
|
(1,'x',1),(2,'d',2),(3,'r',3),(4,'f',4),(5,'y',5),
|
|
(6,'u',6),(7,'m',7),(8,'k',8),(9,'o',9),(10,'w',1),
|
|
(11,'m',2),(12,'q',3),(13,'m',4),(14,'d',5),
|
|
(15,'g',6),(16,'x',7),(17,'f',8);
|
|
explain
|
|
SELECT * FROM t1 WHERE b IN (
|
|
SELECT d FROM t2, t1
|
|
WHERE a = d AND ( pk < 2 OR d = 'z' )
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY t1 ALL b NULL NULL NULL 19
|
|
1 PRIMARY <subquery2> eq_ref distinct_key distinct_key 4 func 1
|
|
2 MATERIALIZED t2 index PRIMARY,d d 9 NULL 17 Using where; Using index
|
|
2 MATERIALIZED t1 ref a a 5 test.t2.d 1 Using where; Using index
|
|
SELECT * FROM t1 WHERE b IN (
|
|
SELECT d FROM t2, t1
|
|
WHERE a = d AND ( pk < 2 OR d = 'z' )
|
|
);
|
|
a b c
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# BUG#951937: Wrong result (missing rows) with semijoin+materialization, IN subquery, InnoDB, TEMPTABLE view
|
|
#
|
|
CREATE TABLE t1 (
|
|
a VARCHAR(1),
|
|
b VARCHAR(1) NOT NULL,
|
|
KEY(a)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES
|
|
('j','j'),('v','v'),('c','c'),('m','m'),('d','d'),
|
|
('y','y'),('t','t'),('d','d'),('s','s'),('r','r'),
|
|
('m','m'),('b','b'),('x','x'),('g','g'),('p','p'),
|
|
('q','q'),('w','w'),('d','d'),('e','e');
|
|
CREATE ALGORITHM=TEMPTABLE VIEW v1 AS SELECT * FROM t1;
|
|
# This query returned 6 rows instead of 19
|
|
SELECT * FROM v1
|
|
WHERE ( a, a ) IN (
|
|
SELECT alias2.b, alias2.a
|
|
FROM t1 AS alias1, t1 AS alias2
|
|
WHERE alias2.b = alias1.a
|
|
AND ( alias1.b >= alias1.a OR alias2.b = 'z' )
|
|
);
|
|
a b
|
|
b b
|
|
c c
|
|
d d
|
|
d d
|
|
d d
|
|
e e
|
|
g g
|
|
j j
|
|
m m
|
|
m m
|
|
p p
|
|
q q
|
|
r r
|
|
s s
|
|
t t
|
|
v v
|
|
w w
|
|
x x
|
|
y y
|
|
# Another testcase, without the VIEW:
|
|
CREATE TABLE t2 (a VARCHAR(1), b VARCHAR(1) NOT NULL, KEY(a)) ENGINE=InnoDB;
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
INSERT INTO t2 SELECT * FROM t1;
|
|
EXPLAIN
|
|
SELECT * FROM t2
|
|
WHERE (a, a) IN (SELECT alias2.b, alias2.a FROM t1 AS alias1, t1 AS alias2
|
|
WHERE
|
|
alias2.b = alias1.a AND
|
|
(alias1.b >= alias1.a OR alias2.b = 'z'));
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY <subquery2> ALL distinct_key NULL NULL NULL 19
|
|
1 PRIMARY t2 ref a a 4 test.alias1.a 1
|
|
2 MATERIALIZED alias1 ALL a NULL NULL NULL 19 Using where
|
|
2 MATERIALIZED alias2 ref a a 4 test.alias1.a 1 Using where
|
|
SELECT * FROM t2
|
|
WHERE (a, a) IN (SELECT alias2.b, alias2.a FROM t1 AS alias1, t1 AS alias2
|
|
WHERE
|
|
alias2.b = alias1.a AND
|
|
(alias1.b >= alias1.a OR alias2.b = 'z'));
|
|
a b
|
|
b b
|
|
b b
|
|
c c
|
|
c c
|
|
d d
|
|
d d
|
|
d d
|
|
d d
|
|
d d
|
|
d d
|
|
e e
|
|
e e
|
|
g g
|
|
g g
|
|
j j
|
|
j j
|
|
m m
|
|
m m
|
|
m m
|
|
m m
|
|
p p
|
|
p p
|
|
q q
|
|
q q
|
|
r r
|
|
r r
|
|
s s
|
|
s s
|
|
t t
|
|
t t
|
|
v v
|
|
v v
|
|
w w
|
|
w w
|
|
x x
|
|
x x
|
|
y y
|
|
y y
|
|
DROP VIEW v1;
|
|
DROP TABLE t1, t2;
|
|
#
|
|
# BUG#965872: Server crashes in embedding_sjm on a simple 1-table select with AND and OR
|
|
# (this is a regression caused by the fix for BUG#951937)
|
|
CREATE TABLE t1 ( a INT, b INT, c INT, d INT );
|
|
INSERT INTO t1 VALUES (4,2,8,9),(4,2,7,8);
|
|
SELECT * FROM t1
|
|
WHERE a = d AND ( b = 50 AND b = d OR a = c );
|
|
a b c d
|
|
DROP TABLE t1;
|
|
#
|
|
# BUG#951283: Wrong result (missing rows) with semijoin+firstmatch, IN/ANY subquery
|
|
#
|
|
set @tmp_951283=@@optimizer_prune_level;
|
|
SET optimizer_prune_level=0;
|
|
CREATE TABLE t1 ( a INT ) ENGINE=InnoDB;
|
|
INSERT INTO t1 VALUES
|
|
(10),(11),(12),(13),(14),(15),(16),
|
|
(17),(18),(19),(20),(21),(22),(23);
|
|
CREATE TABLE t2 (
|
|
b INT PRIMARY KEY,
|
|
c VARCHAR(1),
|
|
d VARCHAR(1),
|
|
KEY(c)
|
|
) ENGINE=InnoDB;
|
|
INSERT INTO t2 VALUES
|
|
(1,'j','j'),(2,'v','v'),(3,'c','c'),(4,'m','m'),
|
|
(5,'d','d'),(6,'d','d'),(7,'y','y'),(8,'t','t'),
|
|
(9,'d','d'),(10,'s','s'),(11,'r','r'),(12,'m','m'),
|
|
(13,'b','b'),(14,'x','x'),(15,'g','g'),(16,'p','p'),
|
|
(17,'q','q'),(18,'w','w'),(19,'d','d');
|
|
EXPLAIN
|
|
SELECT COUNT(*) FROM t1 AS alias1, t1 AS alias2, t2 AS alias3
|
|
WHERE alias3.d IN (
|
|
SELECT alias4.c FROM t2 AS alias4, t2 AS alias5
|
|
WHERE alias5.b = alias4.b
|
|
AND ( alias5.b >= alias3.b OR alias5.c != alias3.c )
|
|
);
|
|
id select_type table type possible_keys key key_len ref rows Extra
|
|
1 PRIMARY alias3 ALL PRIMARY NULL NULL NULL 19 Using where
|
|
1 PRIMARY alias4 ref PRIMARY,c c 4 test.alias3.d 1 Using index
|
|
1 PRIMARY alias5 eq_ref PRIMARY PRIMARY 4 test.alias4.b 1 Using where; FirstMatch(alias3)
|
|
1 PRIMARY alias2 ALL NULL NULL NULL NULL 14 Using join buffer (flat, BNL join)
|
|
1 PRIMARY alias1 ALL NULL NULL NULL NULL 14 Using join buffer (flat, BNL join)
|
|
SELECT COUNT(*) FROM t1 AS alias1, t1 AS alias2, t2 AS alias3
|
|
WHERE alias3.d IN (
|
|
SELECT alias4.c FROM t2 AS alias4, t2 AS alias5
|
|
WHERE alias5.b = alias4.b
|
|
AND ( alias5.b >= alias3.b OR alias5.c != alias3.c )
|
|
);
|
|
COUNT(*)
|
|
3724
|
|
set optimizer_prune_level=@tmp_951283;
|
|
DROP TABLE t1,t2;
|
|
# This must be the last in the file:
|
|
set optimizer_switch=@subselect_sj2_tmp;
|