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Diffstat (limited to 'mysql-test/main/index_merge_myisam.result')
| -rw-r--r-- | mysql-test/main/index_merge_myisam.result | 1717 |
1 files changed, 1717 insertions, 0 deletions
diff --git a/mysql-test/main/index_merge_myisam.result b/mysql-test/main/index_merge_myisam.result new file mode 100644 index 00000000000..992e1d831b5 --- /dev/null +++ b/mysql-test/main/index_merge_myisam.result @@ -0,0 +1,1717 @@ +set @optimizer_switch_save= @@optimizer_switch; +set optimizer_switch='index_merge_sort_intersection=off'; +#---------------- Index merge test 1 ------------------------------------------- +SET SESSION STORAGE_ENGINE = MyISAM; +drop table if exists t0, t1, t2, t3, t4; +create table t0 +( +key1 int not null, +INDEX i1(key1) +); +alter table t0 add key2 int not null, add index i2(key2); +alter table t0 add key3 int not null, add index i3(key3); +alter table t0 add key4 int not null, add index i4(key4); +alter table t0 add key5 int not null, add index i5(key5); +alter table t0 add key6 int not null, add index i6(key6); +alter table t0 add key7 int not null, add index i7(key7); +alter table t0 add key8 int not null, add index i8(key8); +update t0 set key2=key1,key3=key1,key4=key1,key5=key1,key6=key1,key7=key1,key8=1024-key1; +analyze table t0; +Table Op Msg_type Msg_text +test.t0 analyze status OK +explain select * from t0 where key1 < 3 or key1 > 1020; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 range i1 i1 4 NULL 78 Using index condition; Using where +explain +select * from t0 where key1 < 3 or key2 > 1020; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 45 Using sort_union(i1,i2); Using where +select * from t0 where key1 < 3 or key2 > 1020; +key1 key2 key3 key4 key5 key6 key7 key8 +1 1 1 1 1 1 1 1023 +2 2 2 2 2 2 2 1022 +1021 1021 1021 1021 1021 1021 1021 3 +1022 1022 1022 1022 1022 1022 1022 2 +1023 1023 1023 1023 1023 1023 1023 1 +1024 1024 1024 1024 1024 1024 1024 0 +select * from t0 where key1=1022; +key1 key2 key3 key4 key5 key6 key7 key8 +1022 1022 1022 1022 1022 1022 1022 2 +explain select * from t0 where key1 < 3 or key2 <4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using sort_union(i1,i2); Using where +explain +select * from t0 where (key1 > 30 and key1<35) or (key2 >32 and key2 < 40); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 11 Using sort_union(i1,i2); Using where +select * from t0 where (key1 > 30 and key1<35) or (key2 >32 and key2 < 40); +key1 key2 key3 key4 key5 key6 key7 key8 +31 31 31 31 31 31 31 993 +32 32 32 32 32 32 32 992 +33 33 33 33 33 33 33 991 +34 34 34 34 34 34 34 990 +35 35 35 35 35 35 35 989 +36 36 36 36 36 36 36 988 +37 37 37 37 37 37 37 987 +38 38 38 38 38 38 38 986 +39 39 39 39 39 39 39 985 +explain select * from t0 ignore index (i2) where key1 < 3 or key2 <4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL i1 NULL NULL NULL 1024 Using where +explain select * from t0 where (key1 < 3 or key2 <4) and key3 = 50; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ref i1,i2,i3 i3 4 const 1 Using where +explain select * from t0 use index (i1,i2) where (key1 < 3 or key2 <4) and key3 = 50; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using sort_union(i1,i2); Using where +explain select * from t0 where (key1 > 1 or key2 > 2); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL i1,i2 NULL NULL NULL 1024 Using where +explain select * from t0 force index (i1,i2) where (key1 > 1 or key2 > 2); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 1024 Using sort_union(i1,i2); Using where +explain +select * from t0 where key1<3 or key2<3 or (key1>5 and key1<8) or +(key1>10 and key1<12) or (key2>100 and key2<110); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 17 Using sort_union(i1,i2); Using where +explain select * from t0 where key2 = 45 or key1 <=> null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 range i1,i2 i2 4 NULL 1 Using index condition +explain select * from t0 where key2 = 45 or key1 is not null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL i1,i2 NULL NULL NULL 1024 Using where +explain select * from t0 where key2 = 45 or key1 is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ref i2 i2 4 const 1 +explain select * from t0 where key2=10 or key3=3 or key4 <=> null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i2,i3,i4 i2,i3 4,4 NULL 2 Using union(i2,i3); Using where +explain select * from t0 where key2=10 or key3=3 or key4 is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i2,i3 i2,i3 4,4 NULL 2 Using union(i2,i3); Using where +explain select key1 from t0 where (key1 <=> null) or (key2 < 5) or +(key3=10) or (key4 <=> null); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i4 i2,i3 4,4 NULL 6 Using sort_union(i2,i3); Using where +explain select key1 from t0 where (key1 <=> null) or (key1 < 5) or +(key3=10) or (key4 <=> null); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i3,i4 i1,i3 4,4 NULL 6 Using sort_union(i1,i3); Using where +explain select * from t0 where +(key1 < 3 or key2 < 3) and (key3 < 4 or key4 < 4) and (key5 < 5 or key6 < 5); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i4,i5,i6 i1,i2 4,4 NULL 6 Using sort_union(i1,i2); Using where +explain +select * from t0 where (key1 < 3 or key2 < 6) and (key1 < 7 or key3 < 4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 9 Using sort_union(i1,i2); Using where +select * from t0 where (key1 < 3 or key2 < 6) and (key1 < 7 or key3 < 4); +key1 key2 key3 key4 key5 key6 key7 key8 +1 1 1 1 1 1 1 1023 +2 2 2 2 2 2 2 1022 +3 3 3 3 3 3 3 1021 +4 4 4 4 4 4 4 1020 +5 5 5 5 5 5 5 1019 +explain select * from t0 where +(key1 < 3 or key2 < 3) and (key3 < 4 or key4 < 4) and (key5 < 2 or key6 < 2); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i4,i5,i6 i1,i2 4,4 NULL 6 Using sort_union(i1,i2); Using where +explain select * from t0 where +(key1 < 3 or key2 < 3) and (key3 < 100); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 6 Using sort_union(i1,i2); Using where +explain select * from t0 where +(key1 < 3 or key2 < 3) and (key3 < 1000); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 6 Using sort_union(i1,i2); Using where +explain select * from t0 where +((key1 < 4 or key2 < 4) and (key2 <5 or key3 < 4)) +or +key2 > 5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL i1,i2,i3 NULL NULL NULL 1024 Using where +explain select * from t0 where +((key1 < 4 or key2 < 4) and (key2 <5 or key3 < 4)) +or +key1 < 7; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 10 Using sort_union(i1,i2); Using where +select * from t0 where +((key1 < 4 or key2 < 4) and (key2 <5 or key3 < 4)) +or +key1 < 7; +key1 key2 key3 key4 key5 key6 key7 key8 +1 1 1 1 1 1 1 1023 +2 2 2 2 2 2 2 1022 +3 3 3 3 3 3 3 1021 +4 4 4 4 4 4 4 1020 +5 5 5 5 5 5 5 1019 +6 6 6 6 6 6 6 1018 +explain select * from t0 where +((key1 < 4 or key2 < 4) and (key3 <5 or key5 < 4)) +or +((key5 < 5 or key6 < 6) and (key7 <7 or key8 < 4)); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7,i8 i1,i2,i5,i6 4,4,4,4 NULL 19 Using sort_union(i1,i2,i5,i6); Using where +explain select * from t0 where +((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4)) +or +((key7 <7 or key8 < 4) and (key5 < 5 or key6 < 6)); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7,i8 i3,i5,i7,i8 4,4,4,4 NULL 20 Using sort_union(i3,i5,i7,i8); Using where +explain select * from t0 where +((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4)) +or +((key3 <7 or key5 < 2) and (key5 < 5 or key6 < 6)); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i5,i6 i3,i5 4,4 NULL 11 Using sort_union(i3,i5); Using where +explain select * from t0 where +((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4)) +or +(((key3 <7 and key7 < 6) or key5 < 2) and (key5 < 5 or key6 < 6)); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7 i3,i5 4,4 NULL 11 Using sort_union(i3,i5); Using where +explain select * from t0 where +((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4)) +or +((key3 >=5 or key5 < 2) and (key5 < 5 or key6 < 6)); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ALL i1,i2,i3,i5,i6 NULL NULL NULL 1024 Using where +explain select * from t0 force index(i1, i2, i3, i4, i5, i6 ) where +((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4)) +or +((key3 >=5 or key5 < 2) and (key5 < 5 or key6 < 6)); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2,i3,i5,i6 i3,i5 0,4 NULL 1024 Using sort_union(i3,i5); Using where +select * from t0 where key1 < 5 or key8 < 4 order by key1; +key1 key2 key3 key4 key5 key6 key7 key8 +1 1 1 1 1 1 1 1023 +2 2 2 2 2 2 2 1022 +3 3 3 3 3 3 3 1021 +4 4 4 4 4 4 4 1020 +1021 1021 1021 1021 1021 1021 1021 3 +1022 1022 1022 1022 1022 1022 1022 2 +1023 1023 1023 1023 1023 1023 1023 1 +1024 1024 1024 1024 1024 1024 1024 0 +explain +select * from t0 where key1 < 5 or key8 < 4 order by key1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i8 i1,i8 4,4 NULL 9 Using sort_union(i1,i8); Using where; Using filesort +create table t2 like t0; +insert into t2 select * from t0; +alter table t2 add index i1_3(key1, key3); +alter table t2 add index i2_3(key2, key3); +alter table t2 drop index i1; +alter table t2 drop index i2; +alter table t2 add index i321(key3, key2, key1); +explain select key3 from t2 where key1 = 100 or key2 = 100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index_merge i1_3,i2_3 i1_3,i2_3 4,4 NULL 2 Using sort_union(i1_3,i2_3); Using where +explain select key3 from t2 where key1 < 500 or key2 < 500; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index i1_3,i2_3 i321 12 NULL 1024 Using where; Using index +explain select key7 from t2 where key1 <100 or key2 < 100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index_merge i1_3,i2_3 i1_3,i2_3 4,4 NULL 188 Using sort_union(i1_3,i2_3); Using where +create table t4 ( +key1a int not null, +key1b int not null, +key2 int not null, +key2_1 int not null, +key2_2 int not null, +key3 int not null, +index i1a (key1a, key1b), +index i1b (key1b, key1a), +index i2_1(key2, key2_1), +index i2_2(key2, key2_1) +); +Warnings: +Note 1831 Duplicate index `i2_2`. This is deprecated and will be disallowed in a future release +insert into t4 select key1,key1,key1 div 10, key1 % 10, key1 % 10, key1 from t0; +select * from t4 where key1a = 3 or key1b = 4; +key1a key1b key2 key2_1 key2_2 key3 +3 3 0 3 3 3 +4 4 0 4 4 4 +explain select * from t4 where key1a = 3 or key1b = 4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 index_merge i1a,i1b i1a,i1b 4,4 NULL 2 Using sort_union(i1a,i1b); Using where +explain select * from t4 where key2 = 1 and (key2_1 = 1 or key3 = 5); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ref i2_1,i2_2 i2_1 4 const 10 Using where +explain select * from t4 where key2 = 1 and (key2_1 = 1 or key2_2 = 5); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ref i2_1,i2_2 i2_1 4 const 10 Using where +explain select * from t4 where key2_1 = 1 or key2_2 = 5; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t4 ALL NULL NULL NULL NULL 1024 Using where +create table t1 like t0; +insert into t1 select * from t0; +explain select * from t0 left join t1 on (t0.key1=t1.key1) +where t0.key1=3 or t0.key2=4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where +1 SIMPLE t1 ref i1 i1 4 test.t0.key1 1 +select * from t0 left join t1 on (t0.key1=t1.key1) +where t0.key1=3 or t0.key2=4; +key1 key2 key3 key4 key5 key6 key7 key8 key1 key2 key3 key4 key5 key6 key7 key8 +3 3 3 3 3 3 3 1021 3 3 3 3 3 3 3 1021 +4 4 4 4 4 4 4 1020 4 4 4 4 4 4 4 1020 +explain +select * from t0,t1 where (t0.key1=t1.key1) and ( t0.key1=3 or t0.key2=4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where +1 SIMPLE t1 ref i1 i1 4 test.t0.key1 1 +explain +select * from t0,t1 where (t0.key1=t1.key1) and +(t0.key1=3 or t0.key2=4) and t1.key1<200; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where +1 SIMPLE t1 ref i1 i1 4 test.t0.key1 1 +explain +select * from t0,t1 where (t0.key1=t1.key1) and +(t0.key1=3 or t0.key2<4) and t1.key1=2; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ref i1,i2 i1 4 const 1 Using where +1 SIMPLE t1 ref i1 i1 4 const 1 +explain select * from t0,t1 where t0.key1 = 5 and +(t1.key1 = t0.key1 or t1.key8 = t0.key1); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 ref i1 i1 4 const 1 +1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using union(i1,i8); Using where; Using join buffer (flat, BNL join) +explain select * from t0,t1 where t0.key1 < 3 and +(t1.key1 = t0.key1 or t1.key8 = t0.key1); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 range i1 i1 4 NULL 3 Using index condition +1 SIMPLE t1 ALL i1,i8 NULL NULL NULL 1024 Range checked for each record (index map: 0x81) +explain select * from t1 where key1=3 or key2=4 +union select * from t1 where key1<4 or key3=5; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where +2 UNION t1 index_merge i1,i3 i1,i3 4,4 NULL 5 Using sort_union(i1,i3); Using where +NULL UNION RESULT <union1,2> ALL NULL NULL NULL NULL NULL +set @tmp_optimizer_switch=@@optimizer_switch; +set optimizer_switch='derived_merge=off,derived_with_keys=off'; +explain select * from (select * from t1 where key1 = 3 or key2 =3) as Z where key8 >5; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY <derived2> ALL NULL NULL NULL NULL 2 Using where +2 DERIVED t1 index_merge i1,i2,i8 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where +set optimizer_switch=@tmp_optimizer_switch; +create table t3 like t0; +insert into t3 select * from t0; +alter table t3 add key9 int not null, add index i9(key9); +alter table t3 add keyA int not null, add index iA(keyA); +alter table t3 add keyB int not null, add index iB(keyB); +alter table t3 add keyC int not null, add index iC(keyC); +update t3 set key9=key1,keyA=key1,keyB=key1,keyC=key1; +explain select * from t3 where +key1=1 or key2=2 or key3=3 or key4=4 or +key5=5 or key6=6 or key7=7 or key8=8 or +key9=9 or keyA=10 or keyB=11 or keyC=12; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t3 index_merge i1,i2,i3,i4,i5,i6,i7,i8,i9,iA,iB,iC i1,i2,i3,i4,i5,i6,i7,i8,i9,iA,iB,iC 4,4,4,4,4,4,4,4,4,4,4,4 NULL 12 Using union(i1,i2,i3,i4,i5,i6,i7,i8,i9,iA,iB,iC); Using where +select * from t3 where +key1=1 or key2=2 or key3=3 or key4=4 or +key5=5 or key6=6 or key7=7 or key8=8 or +key9=9 or keyA=10 or keyB=11 or keyC=12; +key1 key2 key3 key4 key5 key6 key7 key8 key9 keyA keyB keyC +1 1 1 1 1 1 1 1023 1 1 1 1 +2 2 2 2 2 2 2 1022 2 2 2 2 +3 3 3 3 3 3 3 1021 3 3 3 3 +4 4 4 4 4 4 4 1020 4 4 4 4 +5 5 5 5 5 5 5 1019 5 5 5 5 +6 6 6 6 6 6 6 1018 6 6 6 6 +7 7 7 7 7 7 7 1017 7 7 7 7 +9 9 9 9 9 9 9 1015 9 9 9 9 +10 10 10 10 10 10 10 1014 10 10 10 10 +11 11 11 11 11 11 11 1013 11 11 11 11 +12 12 12 12 12 12 12 1012 12 12 12 12 +1016 1016 1016 1016 1016 1016 1016 8 1016 1016 1016 1016 +explain select * from t0 where key1 < 3 or key2 < 4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using sort_union(i1,i2); Using where +select * from t0 where key1 < 3 or key2 < 4; +key1 key2 key3 key4 key5 key6 key7 key8 +1 1 1 1 1 1 1 1023 +2 2 2 2 2 2 2 1022 +3 3 3 3 3 3 3 1021 +update t0 set key8=123 where key1 < 3 or key2 < 4; +select * from t0 where key1 < 3 or key2 < 4; +key1 key2 key3 key4 key5 key6 key7 key8 +1 1 1 1 1 1 1 123 +2 2 2 2 2 2 2 123 +3 3 3 3 3 3 3 123 +delete from t0 where key1 < 3 or key2 < 4; +select * from t0 where key1 < 3 or key2 < 4; +key1 key2 key3 key4 key5 key6 key7 key8 +select count(*) from t0; +count(*) +1021 +drop table t4; +create table t4 (a int); +insert into t4 values (1),(4),(3); +set @save_join_buffer_size=@@join_buffer_size; +set join_buffer_size= 4096; +explain select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +from t0 as A force index(i1,i2), t0 as B force index (i1,i2) +where (A.key1 < 500000 or A.key2 < 3) +and (B.key1 < 500000 or B.key2 < 3); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE A index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where +1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1013 Using sort_union(i1,i2); Using where; Using join buffer (flat, BNL join) +select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +from t0 as A force index(i1,i2), t0 as B force index (i1,i2) +where (A.key1 < 500000 or A.key2 < 3) +and (B.key1 < 500000 or B.key2 < 3); +max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +10240 +update t0 set key1=1; +explain select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +from t0 as A force index(i1,i2), t0 as B force index (i1,i2) +where (A.key1 = 1 or A.key2 = 1) +and (B.key1 = 1 or B.key2 = 1); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE A index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where +1 SIMPLE B index_merge i1,i2 i1,i2 4,4 NULL 1020 Using union(i1,i2); Using where; Using join buffer (flat, BNL join) +select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +from t0 as A force index(i1,i2), t0 as B force index (i1,i2) +where (A.key1 = 1 or A.key2 = 1) +and (B.key1 = 1 or B.key2 = 1); +max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +8194 +alter table t0 add filler1 char(200), add filler2 char(200), add filler3 char(200); +update t0 set key2=1, key3=1, key4=1, key5=1,key6=1,key7=1 where key7 < 500; +explain select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +from t0 as A straight_join t0 as B +where (A.key1 = 1 and A.key2 = 1 and A.key3 = 1 and A.key4=1 and A.key5=1 and A.key6=1 and A.key7 = 1 or A.key8=1) +and (B.key1 = 1 and B.key2 = 1 and B.key3 = 1 and B.key4=1 and B.key5=1 and B.key6=1 and B.key7 = 1 or B.key8=1); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE A index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where +1 SIMPLE B index_merge i1,i2,i3,i4,i5,i6,i7?,i8 i2,i3,i4,i5,i6,i7?,i8 X NULL # Using union(intersect(i2,i3,i4,i5,i6,i7?),i8); Using where; Using join buffer (flat, BNL join) +select max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +from t0 as A straight_join t0 as B +where (A.key1 = 1 and A.key2 = 1 and A.key3 = 1 and A.key4=1 and A.key5=1 and A.key6=1 and A.key7 = 1 or A.key8=1) +and (B.key1 = 1 and B.key2 = 1 and B.key3 = 1 and B.key4=1 and B.key5=1 and B.key6=1 and B.key7 = 1 or B.key8=1); +max(A.key1 + B.key1 + A.key2 + B.key2 + A.key3 + B.key3 + A.key4 + B.key4 + A.key5 + B.key5) +8186 +set join_buffer_size= @save_join_buffer_size; +drop table t0, t1, t2, t3, t4; +CREATE TABLE t1 ( +cola char(3) not null, colb char(3) not null, filler char(200), +key(cola), key(colb) +); +INSERT INTO t1 VALUES ('foo','bar', 'ZZ'),('fuz','baz', 'ZZ'); +OPTIMIZE TABLE t1; +Table Op Msg_type Msg_text +test.t1 optimize status OK +select count(*) from t1; +count(*) +8704 +explain select * from t1 WHERE cola = 'foo' AND colb = 'bar'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge cola,colb cola,colb 3,3 NULL 32 Using intersect(cola,colb); Using where +explain select * from t1 force index(cola,colb) WHERE cola = 'foo' AND colb = 'bar'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge cola,colb cola,colb 3,3 NULL 32 Using intersect(cola,colb); Using where +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, +filler1 char(200), filler2 char(200), +key(a),key(b) +); +insert into t1 select @v:= A.a, @v, 't1', 'filler2' from t0 A, t0 B, t0 C; +create table t2 like t1; +create table t3 ( +a int, b int, +filler1 char(200), filler2 char(200), +key(a),key(b) +) engine=merge union=(t1,t2); +explain select * from t1 where a=1 and b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL # Using intersect(a,b); Using where +explain select * from t3 where a=1 and b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t3 index_merge a,b a,b 5,5 NULL # Using intersect(a,b); Using where +drop table t3; +drop table t0, t1, t2; +CREATE TABLE t1(a INT); +INSERT INTO t1 VALUES(1); +CREATE TABLE t2(a INT, b INT, dummy CHAR(16) DEFAULT '', KEY(a), KEY(b)); +INSERT INTO t2(a,b) VALUES +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0),(0,0), +(1,2); +LOCK TABLES t1 WRITE, t2 WRITE; +INSERT INTO t2(a,b) VALUES(1,2); +SELECT t2.a FROM t1,t2 WHERE t2.b=2 AND t2.a=1; +a +1 +1 +UNLOCK TABLES; +DROP TABLE t1, t2; +CREATE TABLE `t1` ( +`a` int(11) DEFAULT NULL, +`filler` char(200) DEFAULT NULL, +`b` int(11) DEFAULT NULL, +KEY `a` (`a`), +KEY `b` (`b`) +) ENGINE=MEMORY DEFAULT CHARSET=latin1; +insert into t1 values +(0, 'filler', 0), (1, 'filler', 1), (2, 'filler', 2), (3, 'filler', 3), +(4, 'filler', 4), (5, 'filler', 5), (6, 'filler', 6), (7, 'filler', 7), +(8, 'filler', 8), (9, 'filler', 9), (0, 'filler', 0), (1, 'filler', 1), +(2, 'filler', 2), (3, 'filler', 3), (4, 'filler', 4), (5, 'filler', 5), +(6, 'filler', 6), (7, 'filler', 7), (8, 'filler', 8), (9, 'filler', 9), +(10, 'filler', 10), (11, 'filler', 11), (12, 'filler', 12), (13, 'filler', 13), +(14, 'filler', 14), (15, 'filler', 15), (16, 'filler', 16), (17, 'filler', 17), +(18, 'filler', 18), (19, 'filler', 19), (4, '5 ', 0), (5, '4 ', 0), +(4, '4 ', 0), (4, 'qq ', 5), (5, 'qq ', 4), (4, 'zz ', 4); +create table t2( +`a` int(11) DEFAULT NULL, +`filler` char(200) DEFAULT NULL, +`b` int(11) DEFAULT NULL, +KEY USING BTREE (`a`), +KEY USING BTREE (`b`) +) ENGINE=MEMORY DEFAULT CHARSET=latin1; +insert into t2 select * from t1; +must use sort-union rather than union: +explain select * from t1 where a=4 or b=4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL # Using sort_union(a,b); Using where +select * from t1 where a=4 or b=4; +a filler b +4 4 0 +4 5 0 +4 filler 4 +4 filler 4 +4 qq 5 +4 zz 4 +5 qq 4 +select * from t1 ignore index(a,b) where a=4 or b=4; +a filler b +4 4 0 +4 5 0 +4 filler 4 +4 filler 4 +4 qq 5 +4 zz 4 +5 qq 4 +must use union, not sort-union: +explain select * from t2 where a=4 or b=4; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 index_merge a,b a,b 5,5 NULL # Using union(a,b); Using where +select * from t2 where a=4 or b=4; +a filler b +4 4 0 +4 5 0 +4 filler 4 +4 filler 4 +4 qq 5 +4 zz 4 +5 qq 4 +drop table t1, t2; +CREATE TABLE t1 (a varchar(8), b set('a','b','c','d','e','f','g','h'), +KEY b(b), KEY a(a)); +INSERT INTO t1 VALUES ('y',''), ('z',''); +SELECT b,a from t1 WHERE (b!='c' AND b!='f' && b!='h') OR +(a='pure-S') OR (a='DE80337a') OR (a='DE80799'); +b a + y + z +DROP TABLE t1; +# +# BUG#40974: Incorrect query results when using clause evaluated using range check +# +create table t0 (a int); +insert into t0 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); +create table t1 (a int); +insert into t1 values (1),(2); +create table t2(a int, b int); +insert into t2 values (1,1), (2, 1000); +create table t3 (a int, b int, filler char(100), key(a), key(b)); +insert into t3 select 1000, 1000,'filler' from t0 A, t0 B, t0 C; +insert into t3 values (1,1,'data'); +insert into t3 values (1,1,'data'); +The plan should be ALL/ALL/ALL(Range checked for each record (index map: 0x3) +explain select * from t1 +where exists (select 1 from t2, t3 +where t2.a=t1.a and (t3.a=t2.b or t3.b=t2.b or t3.b=t2.b+1)); +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 ALL NULL NULL NULL NULL 2 +1 PRIMARY t2 ALL NULL NULL NULL NULL 2 Using where +1 PRIMARY t3 ALL a,b NULL NULL NULL 1002 Range checked for each record (index map: 0x3); FirstMatch(t1) +select * from t1 +where exists (select 1 from t2, t3 +where t2.a=t1.a and (t3.a=t2.b or t3.b=t2.b or t3.b=t2.b+1)); +a +1 +2 +drop table t0, t1, t2, t3; +# +# BUG#44810: index merge and order by with low sort_buffer_size +# crashes server! +# +CREATE TABLE t1(a VARCHAR(128),b VARCHAR(128),KEY(A),KEY(B)); +INSERT INTO t1 VALUES (REPEAT('a',128),REPEAT('b',128)); +INSERT INTO t1 SELECT * FROM t1; +INSERT INTO t1 SELECT * FROM t1; +INSERT INTO t1 SELECT * FROM t1; +INSERT INTO t1 SELECT * FROM t1; +INSERT INTO t1 SELECT * FROM t1; +INSERT INTO t1 SELECT * FROM t1; +SET SESSION sort_buffer_size=1024*8; +EXPLAIN +SELECT * FROM t1 FORCE INDEX(a,b) WHERE a LIKE 'a%' OR b LIKE 'b%' +ORDER BY a,b; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 131,131 NULL 64 Using sort_union(a,b); Using where; Using filesort +SELECT * FROM t1 FORCE INDEX(a,b) WHERE a LIKE 'a%' OR b LIKE 'b%' +ORDER BY a,b; +SET SESSION sort_buffer_size=DEFAULT; +DROP TABLE t1; +End of 5.0 tests +#---------------- ROR-index_merge tests ----------------------- +SET SESSION STORAGE_ENGINE = MyISAM; +drop table if exists t0,t1,t2; +create table t1 +( +/* Field names reflect value(rowid) distribution, st=STairs, swt= SaWTooth */ +st_a int not null default 0, +swt1a int not null default 0, +swt2a int not null default 0, +st_b int not null default 0, +swt1b int not null default 0, +swt2b int not null default 0, +/* fields/keys for row retrieval tests */ +key1 int, +key2 int, +key3 int, +key4 int, +/* make rows much bigger then keys */ +filler1 char (200), +filler2 char (200), +filler3 char (200), +filler4 char (200), +filler5 char (200), +filler6 char (200), +/* order of keys is important */ +key sta_swt12a(st_a,swt1a,swt2a), +key sta_swt1a(st_a,swt1a), +key sta_swt2a(st_a,swt2a), +key sta_swt21a(st_a,swt2a,swt1a), +key st_a(st_a), +key stb_swt1a_2b(st_b,swt1b,swt2a), +key stb_swt1b(st_b,swt1b), +key st_b(st_b), +key(key1), +key(key2), +key(key3), +key(key4) +) ; +create table t0 as select * from t1; +# Printing of many insert into t0 values (....) disabled. +alter table t1 disable keys; +# Printing of many insert into t1 select .... from t0 disabled. +# Printing of many insert into t1 (...) values (....) disabled. +alter table t1 enable keys; +select count(*) from t1; +count(*) +64801 +explain select key1,key2 from t1 where key1=100 and key2=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 77 Using intersect(key1,key2); Using where; Using index +select key1,key2 from t1 where key1=100 and key2=100; +key1 key2 +100 100 +explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 154 Using union(intersect(key1,key2),intersect(key3,key4)); Using where +select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +key1 key2 key3 key4 filler1 +100 100 100 100 key1-key2-key3-key4 +insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, -1, -1, 'key1-key2'); +insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 100, 100, 'key4-key3'); +explain select key1,key2,filler1 from t1 where key1=100 and key2=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 77 Using intersect(key1,key2); Using where +select key1,key2,filler1 from t1 where key1=100 and key2=100; +key1 key2 filler1 +100 100 key1-key2-key3-key4 +100 100 key1-key2 +explain select key1,key2 from t1 where key1=100 and key2=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 77 Using intersect(key1,key2); Using where; Using index +select key1,key2 from t1 where key1=100 and key2=100; +key1 key2 +100 100 +100 100 +explain select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 154 Using union(intersect(key1,key2),intersect(key3,key4)); Using where +select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +key1 key2 key3 key4 +100 100 100 100 +100 100 -1 -1 +-1 -1 100 100 +explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 154 Using union(intersect(key1,key2),intersect(key3,key4)); Using where +select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +key1 key2 key3 key4 filler1 +100 100 100 100 key1-key2-key3-key4 +100 100 -1 -1 key1-key2 +-1 -1 100 100 key4-key3 +explain select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3 key1,key2,key3 5,5,5 NULL 2 Using intersect(key1,key2,key3); Using where; Using index +select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100; +key1 key2 key3 +100 100 100 +insert into t1 (key1,key2,key3,key4,filler1) values (101,101,101,101, 'key1234-101'); +explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=101; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3 key1,key2,key3 5,5,5 NULL 83 Using union(intersect(key1,key2),key3); Using where +select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=101; +key1 key2 key3 key4 filler1 +100 100 100 100 key1-key2-key3-key4 +100 100 -1 -1 key1-key2 +101 101 101 101 key1234-101 +select key1,key2, filler1 from t1 where key1=100 and key2=100; +key1 key2 filler1 +100 100 key1-key2-key3-key4 +100 100 key1-key2 +update t1 set filler1='to be deleted' where key1=100 and key2=100; +update t1 set key1=200,key2=200 where key1=100 and key2=100; +delete from t1 where key1=200 and key2=200; +select key1,key2,filler1 from t1 where key2=100 and key2=200; +key1 key2 filler1 +explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 152 Using union(intersect(key1,key2),intersect(key3,key4)); Using where +select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +key1 key2 key3 key4 filler1 +-1 -1 100 100 key4-key3 +delete from t1 where key3=100 and key4=100; +explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 152 Using union(intersect(key1,key2),intersect(key3,key4)); Using where +select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100; +key1 key2 key3 key4 filler1 +explain select key1,key2 from t1 where key1=100 and key2=100; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 76 Using intersect(key1,key2); Using where; Using index +select key1,key2 from t1 where key1=100 and key2=100; +key1 key2 +insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-1'); +insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-2'); +insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-3'); +explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key3,key1,key2,key4 5,5,5,5 NULL 136 Using union(key3,intersect(key1,key2),key4); Using where +select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200; +key1 key2 key3 key4 filler1 +100 100 200 200 key1-key2-key3-key4-3 +100 100 200 200 key1-key2-key3-key4-2 +100 100 200 200 key1-key2-key3-key4-1 +insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, -1, 200,'key4'); +explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key3,key1,key2,key4 5,5,5,5 NULL 146 Using union(key3,intersect(key1,key2),key4); Using where +select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200; +key1 key2 key3 key4 filler1 +100 100 200 200 key1-key2-key3-key4-3 +100 100 200 200 key1-key2-key3-key4-2 +100 100 200 200 key1-key2-key3-key4-1 +-1 -1 -1 200 key4 +insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 200, -1,'key3'); +explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2,key3,key4 key3,key1,key2,key4 5,5,5,5 NULL 156 Using union(key3,intersect(key1,key2),key4); Using where +select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200; +key1 key2 key3 key4 filler1 +100 100 200 200 key1-key2-key3-key4-3 +100 100 200 200 key1-key2-key3-key4-2 +100 100 200 200 key1-key2-key3-key4-1 +-1 -1 -1 200 key4 +-1 -1 200 -1 key3 +explain select * from t1 where st_a=1 and st_b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b st_a,st_b 4,4 NULL 3515 Using intersect(st_a,st_b); Using where +explain select st_a,st_b from t1 where st_a=1 and st_b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b st_a,st_b 4,4 NULL 3515 Using intersect(st_a,st_b); Using where; Using index +explain select st_a from t1 ignore index (st_a) where st_a=1 and st_b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,stb_swt1a_2b,stb_swt1b,st_b st_b 4 const 15093 Using where +explain select * from t1 where st_a=1 and swt1a=1 and swt2a=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a sta_swt21a 12 const,const,const 971 +explain select * from t1 where st_b=1 and swt1b=1 and swt2b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref stb_swt1a_2b,stb_swt1b,st_b stb_swt1a_2b 8 const,const 3879 Using where +explain select * from t1 where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b sta_swt12a,stb_swt1a_2b 12,12 NULL 58 Using intersect(sta_swt12a,stb_swt1a_2b); Using where +explain select * from t1 ignore index (sta_swt21a, stb_swt1a_2b) +where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,st_a,stb_swt1b,st_b sta_swt12a,stb_swt1b 12,8 NULL 58 Using intersect(sta_swt12a,stb_swt1b); Using where +explain select * from t1 ignore index (sta_swt21a, sta_swt12a, stb_swt1a_2b) +where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt1a,sta_swt2a,st_a,stb_swt1b,st_b sta_swt1a,sta_swt2a,stb_swt1b 8,8,8 NULL 57 Using intersect(sta_swt1a,sta_swt2a,stb_swt1b); Using where +explain select * from t1 ignore index (sta_swt21a, sta_swt12a, stb_swt1a_2b, stb_swt1b) +where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt1a,sta_swt2a,st_a,st_b sta_swt1a,sta_swt2a,st_b 8,8,4 NULL 223 Using intersect(sta_swt1a,sta_swt2a,st_b); Using where +explain select * from t1 +where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b sta_swt12a,stb_swt1a_2b 12,12 NULL 58 Using intersect(sta_swt12a,stb_swt1a_2b); Using where +explain select * from t1 +where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b sta_swt1a,stb_swt1b 8,8 NULL 232 Using intersect(sta_swt1a,stb_swt1b); Using where +explain select st_a from t1 +where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b sta_swt1a,stb_swt1b 8,8 NULL 232 Using intersect(sta_swt1a,stb_swt1b); Using where; Using index +explain select st_a from t1 +where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,sta_swt21a,st_a,stb_swt1a_2b,stb_swt1b,st_b sta_swt1a,stb_swt1b 8,8 NULL 232 Using intersect(sta_swt1a,stb_swt1b); Using where; Using index +drop table t0,t1; +create table t2 ( +a char(10), +b char(10), +filler1 char(255), +filler2 char(255), +key(a(5)), +key(b(5)) +); +select count(a) from t2 where a='BBBBBBBB'; +count(a) +4 +select count(a) from t2 where b='BBBBBBBB'; +count(a) +4 +expla_or_bin select count(a_or_b) from t2 where a_or_b='AAAAAAAA' a_or_bnd a_or_b='AAAAAAAA'; +id select_type ta_or_ba_or_ble type possia_or_ble_keys key key_len ref rows Extra_or_b +1 SIMPLE t2 ref a_or_b,a_or_b a_or_b 6 const 4 Using where +select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA'; +count(a) +4 +select count(a) from t2 ignore index(a,b) where a='AAAAAAAA' and b='AAAAAAAA'; +count(a) +4 +insert into t2 values ('ab', 'ab', 'uh', 'oh'); +explain select a from t2 where a='ab'; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t2 ref a a 6 const 1 Using where +drop table t2; +CREATE TABLE t1(c1 INT, c2 INT DEFAULT 0, c3 CHAR(255) DEFAULT '', +KEY(c1), KEY(c2), KEY(c3)); +INSERT INTO t1(c1) VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0), +(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0); +INSERT INTO t1 VALUES(0,0,0); +CREATE TABLE t2(c1 int); +INSERT INTO t2 VALUES(1); +DELETE t1 FROM t1,t2 WHERE t1.c1=0 AND t1.c2=0; +SELECT * FROM t1; +c1 c2 c3 +DROP TABLE t1,t2; +#---------------- Index merge test 2 ------------------------------------------- +SET SESSION STORAGE_ENGINE = MyISAM; +drop table if exists t1,t2; +create table t1 +( +key1 int not null, +key2 int not null, +INDEX i1(key1), +INDEX i2(key2) +); +explain select * from t1 where key1 < 5 or key2 > 197; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 10 Using sort_union(i1,i2); Using where +select * from t1 where key1 < 5 or key2 > 197; +key1 key2 +0 200 +1 199 +2 198 +3 197 +4 196 +explain select * from t1 where key1 < 3 or key2 > 195; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 10 Using sort_union(i1,i2); Using where +select * from t1 where key1 < 3 or key2 > 195; +key1 key2 +0 200 +1 199 +2 198 +3 197 +4 196 +alter table t1 add str1 char (255) not null, +add zeroval int not null default 0, +add str2 char (255) not null, +add str3 char (255) not null; +update t1 set str1='aaa', str2='bbb', str3=concat(key2, '-', key1 div 2, '_' ,if(key1 mod 2 = 0, 'a', 'A')); +alter table t1 add primary key (str1, zeroval, str2, str3); +explain select * from t1 where key1 < 5 or key2 > 197; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 10 Using sort_union(i1,i2); Using where +select * from t1 where key1 < 5 or key2 > 197; +key1 key2 str1 zeroval str2 str3 +0 200 aaa 0 bbb 200-0_a +1 199 aaa 0 bbb 199-0_A +2 198 aaa 0 bbb 198-1_a +3 197 aaa 0 bbb 197-1_A +4 196 aaa 0 bbb 196-2_a +explain select * from t1 where key1 < 3 or key2 > 195; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 10 Using sort_union(i1,i2); Using where +select * from t1 where key1 < 3 or key2 > 195; +key1 key2 str1 zeroval str2 str3 +0 200 aaa 0 bbb 200-0_a +1 199 aaa 0 bbb 199-0_A +2 198 aaa 0 bbb 198-1_a +3 197 aaa 0 bbb 197-1_A +4 196 aaa 0 bbb 196-2_a +drop table t1; +create table t1 ( +pk integer not null auto_increment primary key, +key1 integer, +key2 integer not null, +filler char (200), +index (key1), +index (key2) +); +show warnings; +Level Code Message +explain select pk from t1 where key1 = 1 and key2 = 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1,key2 key1 5 const 4 Using where +select pk from t1 where key2 = 1 and key1 = 1; +pk +26 +27 +select pk from t1 ignore index(key1,key2) where key2 = 1 and key1 = 1; +pk +26 +27 +drop table t1; +create table t1 ( +pk int primary key auto_increment, +key1a int, +key2a int, +key1b int, +key2b int, +dummy1 int, +dummy2 int, +dummy3 int, +dummy4 int, +key3a int, +key3b int, +filler1 char (200), +index i1(key1a, key1b), +index i2(key2a, key2b), +index i3(key3a, key3b) +); +create table t2 (a int); +insert into t2 values (0),(1),(2),(3),(4),(NULL); +insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b) +select A.a, B.a, C.a, D.a, C.a, D.a from t2 A,t2 B,t2 C, t2 D; +insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b) +select key1a, key1b, key2a, key2b, key3a, key3b from t1; +insert into t1 (key1a, key1b, key2a, key2b, key3a, key3b) +select key1a, key1b, key2a, key2b, key3a, key3b from t1; +analyze table t1; +Table Op Msg_type Msg_text +test.t1 analyze status OK +select count(*) from t1; +count(*) +5184 +explain select count(*) from t1 where +key1a = 2 and key1b is null and key2a = 2 and key2b is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i1,i2 i1,i2 10,10 NULL REF Using intersect(i1,i2); Using where; Using index +select count(*) from t1 where +key1a = 2 and key1b is null and key2a = 2 and key2b is null; +count(*) +4 +explain select count(*) from t1 where +key1a = 2 and key1b is null and key3a = 2 and key3b is null; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i1,i3 i1,i3 10,10 NULL REF Using intersect(i1,i3); Using where; Using index +select count(*) from t1 where +key1a = 2 and key1b is null and key3a = 2 and key3b is null; +count(*) +4 +drop table t1,t2; +create table t1 ( +id1 int, +id2 date , +index idx2 (id1,id2), +index idx1 (id2) +); +insert into t1 values(1,'20040101'), (2,'20040102'); +select * from t1 where id1 = 1 and id2= '20040101'; +id1 id2 +1 2004-01-01 +drop table t1; +drop view if exists v1; +CREATE TABLE t1 ( +`oid` int(11) unsigned NOT NULL auto_increment, +`fk_bbk_niederlassung` int(11) unsigned NOT NULL, +`fk_wochentag` int(11) unsigned NOT NULL, +`uhrzeit_von` time NOT NULL COMMENT 'HH:MM', +`uhrzeit_bis` time NOT NULL COMMENT 'HH:MM', +`geloescht` tinyint(4) NOT NULL, +`version` int(5) NOT NULL, +PRIMARY KEY (`oid`), +KEY `fk_bbk_niederlassung` (`fk_bbk_niederlassung`), +KEY `fk_wochentag` (`fk_wochentag`), +KEY `ix_version` (`version`) +) DEFAULT CHARSET=latin1; +insert into t1 values +(1, 38, 1, '08:00:00', '13:00:00', 0, 1), +(2, 38, 2, '08:00:00', '13:00:00', 0, 1), +(3, 38, 3, '08:00:00', '13:00:00', 0, 1), +(4, 38, 4, '08:00:00', '13:00:00', 0, 1), +(5, 38, 5, '08:00:00', '13:00:00', 0, 1), +(6, 38, 5, '08:00:00', '13:00:00', 1, 2), +(7, 38, 3, '08:00:00', '13:00:00', 1, 2), +(8, 38, 1, '08:00:00', '13:00:00', 1, 2), +(9, 38, 2, '08:00:00', '13:00:00', 1, 2), +(10, 38, 4, '08:00:00', '13:00:00', 1, 2), +(11, 38, 1, '08:00:00', '13:00:00', 0, 3), +(12, 38, 2, '08:00:00', '13:00:00', 0, 3), +(13, 38, 3, '08:00:00', '13:00:00', 0, 3), +(14, 38, 4, '08:00:00', '13:00:00', 0, 3), +(15, 38, 5, '08:00:00', '13:00:00', 0, 3), +(16, 38, 4, '08:00:00', '13:00:00', 0, 4), +(17, 38, 5, '08:00:00', '13:00:00', 0, 4), +(18, 38, 1, '08:00:00', '13:00:00', 0, 4), +(19, 38, 2, '08:00:00', '13:00:00', 0, 4), +(20, 38, 3, '08:00:00', '13:00:00', 0, 4), +(21, 7, 1, '08:00:00', '13:00:00', 0, 1), +(22, 7, 2, '08:00:00', '13:00:00', 0, 1), +(23, 7, 3, '08:00:00', '13:00:00', 0, 1), +(24, 7, 4, '08:00:00', '13:00:00', 0, 1), +(25, 7, 5, '08:00:00', '13:00:00', 0, 1); +create view v1 as +select +zeit1.oid AS oid, +zeit1.fk_bbk_niederlassung AS fk_bbk_niederlassung, +zeit1.fk_wochentag AS fk_wochentag, +zeit1.uhrzeit_von AS uhrzeit_von, +zeit1.uhrzeit_bis AS uhrzeit_bis, +zeit1.geloescht AS geloescht, +zeit1.version AS version +from +t1 zeit1 +where +(zeit1.version = +(select max(zeit2.version) AS `max(version)` + from t1 zeit2 +where +((zeit1.fk_bbk_niederlassung = zeit2.fk_bbk_niederlassung) and +(zeit1.fk_wochentag = zeit2.fk_wochentag) and +(zeit1.uhrzeit_von = zeit2.uhrzeit_von) and +(zeit1.uhrzeit_bis = zeit2.uhrzeit_bis) +) +) +) +and (zeit1.geloescht = 0); +select * from v1 where oid = 21; +oid fk_bbk_niederlassung fk_wochentag uhrzeit_von uhrzeit_bis geloescht version +21 7 1 08:00:00 13:00:00 0 1 +drop view v1; +drop table t1; +CREATE TABLE t1( +t_cpac varchar(2) NOT NULL, +t_vers varchar(4) NOT NULL, +t_rele varchar(2) NOT NULL, +t_cust varchar(4) NOT NULL, +filler1 char(250) default NULL, +filler2 char(250) default NULL, +PRIMARY KEY (t_cpac,t_vers,t_rele,t_cust), +UNIQUE KEY IX_4 (t_cust,t_cpac,t_vers,t_rele), +KEY IX_5 (t_vers,t_rele,t_cust) +); +insert into t1 values +('tm','2.5 ','a ',' ','',''), ('tm','2.5U','a ','stnd','',''), +('da','3.3 ','b ',' ','',''), ('da','3.3U','b ','stnd','',''), +('tl','7.6 ','a ',' ','',''), ('tt','7.6 ','a ',' ','',''), +('bc','B61 ','a ',' ','',''), ('bp','B61 ','a ',' ','',''), +('ca','B61 ','a ',' ','',''), ('ci','B61 ','a ',' ','',''), +('cp','B61 ','a ',' ','',''), ('dm','B61 ','a ',' ','',''), +('ec','B61 ','a ',' ','',''), ('ed','B61 ','a ',' ','',''), +('fm','B61 ','a ',' ','',''), ('nt','B61 ','a ',' ','',''), +('qm','B61 ','a ',' ','',''), ('tc','B61 ','a ',' ','',''), +('td','B61 ','a ',' ','',''), ('tf','B61 ','a ',' ','',''), +('tg','B61 ','a ',' ','',''), ('ti','B61 ','a ',' ','',''), +('tp','B61 ','a ',' ','',''), ('ts','B61 ','a ',' ','',''), +('wh','B61 ','a ',' ','',''), ('bc','B61U','a ','stnd','',''), +('bp','B61U','a ','stnd','',''), ('ca','B61U','a ','stnd','',''), +('ci','B61U','a ','stnd','',''), ('cp','B61U','a ','stnd','',''), +('dm','B61U','a ','stnd','',''), ('ec','B61U','a ','stnd','',''), +('fm','B61U','a ','stnd','',''), ('nt','B61U','a ','stnd','',''), +('qm','B61U','a ','stnd','',''), ('tc','B61U','a ','stnd','',''), +('td','B61U','a ','stnd','',''), ('tf','B61U','a ','stnd','',''), +('tg','B61U','a ','stnd','',''), ('ti','B61U','a ','stnd','',''), +('tp','B61U','a ','stnd','',''), ('ts','B61U','a ','stnd','',''), +('wh','B61U','a ','stnd','',''); +show create table t1; +Table Create Table +t1 CREATE TABLE `t1` ( + `t_cpac` varchar(2) NOT NULL, + `t_vers` varchar(4) NOT NULL, + `t_rele` varchar(2) NOT NULL, + `t_cust` varchar(4) NOT NULL, + `filler1` char(250) DEFAULT NULL, + `filler2` char(250) DEFAULT NULL, + PRIMARY KEY (`t_cpac`,`t_vers`,`t_rele`,`t_cust`), + UNIQUE KEY `IX_4` (`t_cust`,`t_cpac`,`t_vers`,`t_rele`), + KEY `IX_5` (`t_vers`,`t_rele`,`t_cust`) +) ENGINE=MyISAM DEFAULT CHARSET=latin1 +select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6'; +t_vers t_rele t_cust filler1 +7.6 a +7.6 a +select t_vers,t_rele,t_cust,filler1 from t1 where t_vers = '7.6' + and t_rele='a' and t_cust = ' '; +t_vers t_rele t_cust filler1 +7.6 a +7.6 a +drop table t1; +create table t1 ( +pk int(11) not null auto_increment, +a int(11) not null default '0', +b int(11) not null default '0', +c int(11) not null default '0', +filler1 datetime, filler2 varchar(15), +filler3 longtext, +kp1 varchar(4), kp2 varchar(7), +kp3 varchar(2), kp4 varchar(4), +kp5 varchar(7), +filler4 char(1), +primary key (pk), +key idx1(a,b,c), +key idx2(c), +key idx3(kp1,kp2,kp3,kp4,kp5) +) default charset=latin1; +set @fill=NULL; +SELECT COUNT(*) FROM t1 WHERE b = 0 AND a = 0 AND c = 13286427 AND +kp1='279' AND kp2='ELM0678' AND kp3='6' AND kp4='10' AND kp5 = 'R '; +COUNT(*) +1 +drop table t1; +create table t1 +( +key1 int not null, +key2 int not null default 0, +key3 int not null default 0 +); +insert into t1(key1) values (1),(2),(3),(4),(5),(6),(7),(8); +set @d=8; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +insert into t1 (key1) select key1+@d from t1; +set @d=@d*2; +alter table t1 add index i2(key2); +alter table t1 add index i3(key3); +update t1 set key2=key1,key3=key1; +analyze table t1; +Table Op Msg_type Msg_text +test.t1 analyze status OK +explain select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge i2,i3 i3,i2 4,4 NULL REF Using sort_union(i3,i2); Using where +select * from t1 where (key3 > 30 and key3<35) or (key2 >32 and key2 < 40); +key1 key2 key3 +31 31 31 +32 32 32 +33 33 33 +34 34 34 +35 35 35 +36 36 36 +37 37 37 +38 38 38 +39 39 39 +drop table t1; +# +# Bug#56423: Different count with SELECT and CREATE SELECT queries +# +CREATE TABLE t1 ( +a INT, +b INT, +c INT, +d INT, +PRIMARY KEY (a), +KEY (c), +KEY bd (b,d) +); +INSERT INTO t1 VALUES +(1, 0, 1, 0), +(2, 1, 1, 1), +(3, 1, 1, 1), +(4, 0, 1, 1); +EXPLAIN +SELECT a +FROM t1 +WHERE c = 1 AND b = 1 AND d = 1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref c,bd bd 10 const,const 2 Using where +CREATE TABLE t2 ( a INT ) +SELECT a +FROM t1 +WHERE c = 1 AND b = 1 AND d = 1; +SELECT * FROM t2; +a +2 +3 +DROP TABLE t1, t2; +CREATE TABLE t1( a INT, b INT, KEY(a), KEY(b) ); +INSERT INTO t1 VALUES (1, 2), (1, 2), (1, 2), (1, 2); +SELECT * FROM t1 FORCE INDEX(a, b) WHERE a = 1 AND b = 2; +a b +1 2 +1 2 +1 2 +1 2 +DROP TABLE t1; +# Code coverage of fix. +CREATE TABLE t1 ( a INT NOT NULL AUTO_INCREMENT PRIMARY KEY, b INT); +INSERT INTO t1 (b) VALUES (1); +UPDATE t1 SET b = 2 WHERE a = 1; +SELECT * FROM t1; +a b +1 2 +CREATE TABLE t2 ( a INT NOT NULL AUTO_INCREMENT PRIMARY KEY, b VARCHAR(1) ); +INSERT INTO t2 (b) VALUES ('a'); +UPDATE t2 SET b = 'b' WHERE a = 1; +SELECT * FROM t2; +a b +1 b +DROP TABLE t1, t2; +#---------------- 2-sweeps read Index merge test 2 ------------------------------- +SET SESSION STORAGE_ENGINE = MyISAM; +drop table if exists t1; +create table t1 ( +pk int primary key, +key1 int, +key2 int, +filler char(200), +filler2 char(200), +index(key1), +index(key2) +); +select * from t1 where (key1 >= 2 and key1 <= 10) or (pk >= 4 and pk <=8 ); +pk key1 key2 filler filler2 +10 10 10 filler-data filler-data-2 +9 9 9 filler-data filler-data-2 +8 8 8 filler-data filler-data-2 +7 7 7 filler-data filler-data-2 +6 6 6 filler-data filler-data-2 +5 5 5 filler-data filler-data-2 +4 4 4 filler-data filler-data-2 +3 3 3 filler-data filler-data-2 +2 2 2 filler-data filler-data-2 +set @maxv=1000; +select * from t1 where +(pk < 5) or (pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) or (pk > @maxv-10) +or key1=18 or key1=60; +pk key1 key2 filler filler2 +1000 1000 1000 filler-data filler-data-2 +999 999 999 filler-data filler-data-2 +998 998 998 filler-data filler-data-2 +997 997 997 filler-data filler-data-2 +996 996 996 filler-data filler-data-2 +995 995 995 filler-data filler-data-2 +994 994 994 filler-data filler-data-2 +993 993 993 filler-data filler-data-2 +992 992 992 filler-data filler-data-2 +991 991 991 filler-data filler-data-2 +60 60 60 filler-data filler-data-2 +54 54 54 filler-data filler-data-2 +53 53 53 filler-data filler-data-2 +52 52 52 filler-data filler-data-2 +51 51 51 filler-data filler-data-2 +50 50 50 filler-data filler-data-2 +18 18 18 filler-data filler-data-2 +14 14 14 filler-data filler-data-2 +13 13 13 filler-data filler-data-2 +12 12 12 filler-data filler-data-2 +11 11 11 filler-data filler-data-2 +4 4 4 filler-data filler-data-2 +3 3 3 filler-data filler-data-2 +2 2 2 filler-data filler-data-2 +1 1 1 filler-data filler-data-2 +select * from t1 where +(pk < 5) or (pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) or (pk > @maxv-10) +or key1 < 3 or key1 > @maxv-11; +pk key1 key2 filler filler2 +1000 1000 1000 filler-data filler-data-2 +999 999 999 filler-data filler-data-2 +998 998 998 filler-data filler-data-2 +997 997 997 filler-data filler-data-2 +996 996 996 filler-data filler-data-2 +995 995 995 filler-data filler-data-2 +994 994 994 filler-data filler-data-2 +993 993 993 filler-data filler-data-2 +992 992 992 filler-data filler-data-2 +991 991 991 filler-data filler-data-2 +990 990 990 filler-data filler-data-2 +54 54 54 filler-data filler-data-2 +53 53 53 filler-data filler-data-2 +52 52 52 filler-data filler-data-2 +51 51 51 filler-data filler-data-2 +50 50 50 filler-data filler-data-2 +14 14 14 filler-data filler-data-2 +13 13 13 filler-data filler-data-2 +12 12 12 filler-data filler-data-2 +11 11 11 filler-data filler-data-2 +4 4 4 filler-data filler-data-2 +3 3 3 filler-data filler-data-2 +2 2 2 filler-data filler-data-2 +1 1 1 filler-data filler-data-2 +select * from t1 where +(pk < 5) or (pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) or (pk > @maxv-10) +or +(key1 < 5) or (key1 > 10 and key1 < 15) or (key1 >= 50 and key1 < 55 ) or (key1 > @maxv-10); +pk key1 key2 filler filler2 +1000 1000 1000 filler-data filler-data-2 +999 999 999 filler-data filler-data-2 +998 998 998 filler-data filler-data-2 +997 997 997 filler-data filler-data-2 +996 996 996 filler-data filler-data-2 +995 995 995 filler-data filler-data-2 +994 994 994 filler-data filler-data-2 +993 993 993 filler-data filler-data-2 +992 992 992 filler-data filler-data-2 +991 991 991 filler-data filler-data-2 +54 54 54 filler-data filler-data-2 +53 53 53 filler-data filler-data-2 +52 52 52 filler-data filler-data-2 +51 51 51 filler-data filler-data-2 +50 50 50 filler-data filler-data-2 +14 14 14 filler-data filler-data-2 +13 13 13 filler-data filler-data-2 +12 12 12 filler-data filler-data-2 +11 11 11 filler-data filler-data-2 +4 4 4 filler-data filler-data-2 +3 3 3 filler-data filler-data-2 +2 2 2 filler-data filler-data-2 +1 1 1 filler-data filler-data-2 +select * from t1 where +(pk > 10 and pk < 15) or (pk >= 50 and pk < 55 ) +or +(key1 < 5) or (key1 > @maxv-10); +pk key1 key2 filler filler2 +1000 1000 1000 filler-data filler-data-2 +999 999 999 filler-data filler-data-2 +998 998 998 filler-data filler-data-2 +997 997 997 filler-data filler-data-2 +996 996 996 filler-data filler-data-2 +995 995 995 filler-data filler-data-2 +994 994 994 filler-data filler-data-2 +993 993 993 filler-data filler-data-2 +992 992 992 filler-data filler-data-2 +991 991 991 filler-data filler-data-2 +54 54 54 filler-data filler-data-2 +53 53 53 filler-data filler-data-2 +52 52 52 filler-data filler-data-2 +51 51 51 filler-data filler-data-2 +50 50 50 filler-data filler-data-2 +14 14 14 filler-data filler-data-2 +13 13 13 filler-data filler-data-2 +12 12 12 filler-data filler-data-2 +11 11 11 filler-data filler-data-2 +4 4 4 filler-data filler-data-2 +3 3 3 filler-data filler-data-2 +2 2 2 filler-data filler-data-2 +1 1 1 filler-data filler-data-2 +drop table t1; +#---------------- Clustered PK ROR-index_merge tests ----------------------------- +SET SESSION STORAGE_ENGINE = MyISAM; +drop table if exists t1; +create table t1 +( +pk1 int not null, +pk2 int not null, +key1 int not null, +key2 int not null, +pktail1ok int not null, +pktail2ok int not null, +pktail3bad int not null, +pktail4bad int not null, +pktail5bad int not null, +pk2copy int not null, +badkey int not null, +filler1 char (200), +filler2 char (200), +key (key1), +key (key2), +/* keys with tails from CPK members */ +key (pktail1ok, pk1), +key (pktail2ok, pk1, pk2), +key (pktail3bad, pk2, pk1), +key (pktail4bad, pk1, pk2copy), +key (pktail5bad, pk1, pk2, pk2copy), +primary key (pk1, pk2) +); +explain select * from t1 where pk1 = 1 and pk2 < 80 and key1=0; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 range PRIMARY,key1 PRIMARY 8 NULL 7 Using index condition; Using where +select * from t1 where pk1 = 1 and pk2 < 80 and key1=0; +pk1 pk2 key1 key2 pktail1ok pktail2ok pktail3bad pktail4bad pktail5bad pk2copy badkey filler1 filler2 +1 10 0 0 0 0 0 0 0 10 0 filler-data-10 filler2 +1 11 0 0 0 0 0 0 0 11 0 filler-data-11 filler2 +1 12 0 0 0 0 0 0 0 12 0 filler-data-12 filler2 +1 13 0 0 0 0 0 0 0 13 0 filler-data-13 filler2 +1 14 0 0 0 0 0 0 0 14 0 filler-data-14 filler2 +1 15 0 0 0 0 0 0 0 15 0 filler-data-15 filler2 +1 16 0 0 0 0 0 0 0 16 0 filler-data-16 filler2 +1 17 0 0 0 0 0 0 0 17 0 filler-data-17 filler2 +1 18 0 0 0 0 0 0 0 18 0 filler-data-18 filler2 +1 19 0 0 0 0 0 0 0 19 0 filler-data-19 filler2 +explain select pk1,pk2 from t1 where key1 = 10 and key2=10 and 2*pk1+1 < 2*96+1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where +select pk1,pk2 from t1 where key1 = 10 and key2=10 and 2*pk1+1 < 2*96+1; +pk1 pk2 +95 59 +95 58 +95 57 +95 56 +95 55 +95 54 +95 53 +95 52 +95 51 +95 50 +explain select * from t1 where badkey=1 and key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1 key1 4 const 91 Using where +set @tmp_index_merge_ror_cpk=@@optimizer_switch; +set optimizer_switch='extended_keys=off'; +explain select * from t1 where pk1 < 7500 and key1 = 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref PRIMARY,key1 key1 4 const ROWS Using where +set optimizer_switch=@tmp_index_merge_ror_cpk; +explain select * from t1 where pktail1ok=1 and key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1,pktail1ok pktail1ok 4 const 76 Using where +explain select * from t1 where pktail2ok=1 and key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1,pktail2ok pktail2ok 4 const 82 Using where +explain select * from t1 where (pktail2ok=1 and pk1< 50000) or key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge PRIMARY,key1,pktail2ok pktail2ok,key1 8,4 NULL 173 Using sort_union(pktail2ok,key1); Using where +explain select * from t1 where pktail3bad=1 and key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1,pktail3bad pktail3bad 4 const 73 Using where +explain select * from t1 where pktail4bad=1 and key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1,pktail4bad pktail4bad 4 const 82 Using where +explain select * from t1 where pktail5bad=1 and key1=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref key1,pktail5bad pktail5bad 4 const 70 Using where +explain select pk1,pk2,key1,key2 from t1 where key1 = 10 and key2=10 limit 10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where +select pk1,pk2,key1,key2 from t1 where key1 = 10 and key2=10 limit 10; +pk1 pk2 key1 key2 +104 49 10 10 +104 48 10 10 +104 47 10 10 +104 46 10 10 +104 45 10 10 +104 44 10 10 +104 43 10 10 +104 42 10 10 +104 41 10 10 +104 40 10 10 +drop table t1; +create table t1 +( +RUNID varchar(22), +SUBMITNR varchar(5), +ORDERNR char(1), +PROGRAMM varchar(8), +TESTID varchar(4), +UCCHECK char(1), +ETEXT varchar(80), +ETEXT_TYPE char(1), +INFO char(1), +SEVERITY tinyint(3), +TADIRFLAG char(1), +PRIMARY KEY (RUNID,SUBMITNR,ORDERNR,PROGRAMM,TESTID,UCCHECK), +KEY `TVERM~KEY` (PROGRAMM,TESTID,UCCHECK) +) DEFAULT CHARSET=latin1; +update t1 set `ETEXT` = '', `ETEXT_TYPE`='', `INFO`='', `SEVERITY`='', `TADIRFLAG`='' +WHERE +`RUNID`= '' AND `SUBMITNR`= '' AND `ORDERNR`='' AND `PROGRAMM`='' AND +`TESTID`='' AND `UCCHECK`=''; +drop table t1; +# +# Bug#50402 Optimizer producing wrong results when using Index Merge on InnoDB +# +CREATE TABLE t1 (f1 INT, PRIMARY KEY (f1)); +INSERT INTO t1 VALUES (2); +CREATE TABLE t2 (f1 INT, f2 INT, f3 char(1), +PRIMARY KEY (f1), KEY (f2), KEY (f3) ); +INSERT INTO t2 VALUES (1, 1, 'h'), (2, 3, 'h'), (3, 2, ''), (4, 2, ''); +SELECT t1.f1 FROM t1 +WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h' AND t2.f2 = t1.f1) = 0 AND t1.f1 = 2; +f1 +2 +EXPLAIN SELECT t1.f1 FROM t1 +WHERE (SELECT COUNT(*) FROM t2 WHERE t2.f3 = 'h' AND t2.f2 = t1.f1) = 0 AND t1.f1 = 2; +id select_type table type possible_keys key key_len ref rows Extra +1 PRIMARY t1 system PRIMARY NULL NULL NULL 1 +2 SUBQUERY t2 ref f2,f3 f2 5 const 1 Using where +DROP TABLE t1,t2; +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, c int, filler char(100), +key(a), key(b), key(c)); +insert into t1 select +A.a * B.a*10 + C.a*100, +A.a * B.a*10 + C.a*100, +A.a, +'filler' +from t0 A, t0 B, t0 C; +This should use union: +explain select * from t1 where a=1 or b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 2 Using union(a,b); Using where +This should use ALL: +set optimizer_switch='default,index_merge=off'; +explain select * from t1 where a=1 or b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL a,b NULL NULL NULL 1000 Using where +This should use sort-union: +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a=1 or b=1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 2 Using sort_union(a,b); Using where +This will use sort-union: +set optimizer_switch=default; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 38 Using sort_union(a,b); Using where +This should use ALL: +set optimizer_switch='default,index_merge_sort_union=off'; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL a,b NULL NULL NULL 1000 Using where +This should use ALL: +set optimizer_switch='default,index_merge=off'; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL a,b NULL NULL NULL 1000 Using where +This will use sort-union: +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a<1 or b <1; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 38 Using sort_union(a,b); Using where +alter table t1 add d int, add key(d); +update t1 set d=a; +This will use sort_union: +set optimizer_switch=default; +explain select * from t1 where (a=3 or b in (1,2)) and (c=3 or d=4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c,d a,b 5,5 NULL 3 Using sort_union(a,b); Using where +And if we disable sort_union, union: +set optimizer_switch='default,index_merge_sort_union=off'; +explain select * from t1 where (a=3 or b in (1,2)) and (c=3 or d=4); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c,d c,d 5,5 NULL 100 Using union(c,d); Using where +drop table t1; +create table t1 ( +a int, b int, c int, +filler1 char(200), filler2 char(200), +key(a),key(b),key(c) +); +insert into t1 +select A.a+10*B.a, A.a+10*B.a, A.a+10*B.a+100*C.a, 'foo', 'bar' +from t0 A, t0 B, t0 C, t0 D where D.a<5; +This should be intersect: +set optimizer_switch=default; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where +No intersect when index_merge is disabled: +set optimizer_switch='default,index_merge=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref a,b a 5 const 49 Using where +No intersect if it is disabled: +set optimizer_switch='default,index_merge_sort_intersection=off,index_merge_intersection=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ref a,b a 5 const 49 Using where +Do intersect when union was disabled +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where +Do intersect when sort_union was disabled +set optimizer_switch='default,index_merge_sort_union=off'; +explain select * from t1 where a=10 and b=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b a,b 5,5 NULL 1 Using intersect(a,b); Using where +This will use intersection inside a union: +set optimizer_switch=default; +explain select * from t1 where a=10 and b=10 or c=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c a,b,c 5,5,5 NULL 6 Using union(intersect(a,b),c); Using where +Should be only union left: +set optimizer_switch='default,index_merge_intersection=off'; +explain select * from t1 where a=10 and b=10 or c=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c a,c 5,5 NULL 54 Using union(a,c); Using where +This will switch to sort-union (intersection will be gone, too, +that's a known limitation: +set optimizer_switch='default,index_merge_union=off'; +explain select * from t1 where a=10 and b=10 or c=10; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge a,b,c a,c 5,5 NULL 54 Using sort_union(a,c); Using where +set optimizer_switch=default; +drop table t0, t1; +# +# BUG#834514 Assertion `!table || (!table->read_set || bitmap_is_set(...' with aggregates +# +CREATE TABLE t1 ( a int , b int, c int, KEY (b), PRIMARY KEY (a)) ; +INSERT INTO t1 VALUES (1,4,0),(5,0,0),(6,7,0),(7,7,0),(8,1,0),(9,7,0),(10,1,0); +CREATE TABLE t2 ( b int, c int, KEY (c,b)) ; +INSERT INTO t2 VALUES (7,0),(1,0),(7,0),(1,0); +CREATE TABLE t3 ( a int ) ; +SELECT COUNT(DISTINCT t2.b), CONCAT(t1.c) +FROM t1, t2 +WHERE (t2.c = t1.c) +AND ( +t1.b IN ( 4 ) +OR t1.a = 137 +AND EXISTS ( SELECT a FROM t3 ) +) +GROUP BY 2; +COUNT(DISTINCT t2.b) CONCAT(t1.c) +2 0 +DROP TABLE t1,t2,t3; +# +# MDEV-4556 Server crashes in SEL_ARG::rb_insert with index_merge+index_merge_sort_union, FORCE INDEX +# +CREATE TABLE t1 ( +pk int, +code char(2), +population_rate int, +area_rate int, +primary key (pk), +index (code), +key (population_rate), +key (area_rate) +); +INSERT INTO t1 VALUES (1,'WI',20, 23), (2, 'WA', 13, 18); +EXPLAIN +SELECT * FROM t1 FORCE INDEX ( PRIMARY, population_rate, area_rate, code ) +WHERE pk = 1 OR population_rate = 1 OR ( area_rate IN ( 1,2 ) OR area_rate IS NULL ) +AND (population_rate = 25 OR area_rate BETWEEN 2 AND 25 OR code BETWEEN 'MA' AND 'TX'); +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 index_merge PRIMARY,code,population_rate,area_rate PRIMARY,population_rate,area_rate 4,5,5 NULL 2 Using sort_union(PRIMARY,population_rate,area_rate); Using where +SELECT * FROM t1 FORCE INDEX ( PRIMARY, population_rate, area_rate, code ) +WHERE pk = 1 OR population_rate = 1 OR ( area_rate IN ( 1,2 ) OR area_rate IS NULL ) +AND (population_rate = 25 OR area_rate BETWEEN 2 AND 25 OR code BETWEEN 'MA' AND 'TX'); +pk code population_rate area_rate +1 WI 20 23 +DROP TABLE t1; +# +# MDEV-5069: Server crashes in SEL_ARG::increment_use_count with index_merge+index_merge_sort_union, FORCE INDEX +# +CREATE TABLE t1 ( +c1 varchar(64), +i int, +pk integer auto_increment, +c2 varchar(64), +index (c1), +index (i), +primary key (pk), +key (c2)) ENGINE=myisam; +ALTER TABLE t1 DISABLE KEYS; +INSERT INTO t1 VALUES +('West Virginia', 6121, NULL, 'California'),('Georgia', 60177, NULL, 'Arkansas'), +('Delaware', 90, NULL, 'Oregon'),('Wyoming', 7, NULL, 'Missouri'),( +'Delaware', 2, NULL, 'Utah'),('Wisconsin', 0, NULL, 'Iowa'), +('Kansas', 0, NULL, 'Florida'),('Ohio', 34358, NULL, 'Colorado'), +('Maine', 118, NULL, 'Texas'),('Mississippi', 0, NULL, 'Georgia'), +('Tennessee', 4, NULL, 'N/A'),('Georgia', 0, NULL, 'New Hampshire'), +('Wyoming', 2, NULL, 'N/A'),('Florida', 0, NULL, 'Arizona'), +('Rhode Island', -24002, NULL, 'Michigan'),('Alabama', 142, NULL, 'Indiana'), +('Colorado', 0, NULL, 'Louisiana'),('Michigan', 21194, NULL, 'Louisiana'), +('Oklahoma', 31475, NULL, 'Alabama'),('Pennsylvania', 0, NULL, 'Oklahoma'), +('Texas', 0, NULL, 'Texas'),('West Virginia', 5, NULL, 'Utah'), +('Florida', 49653, NULL, 'Kentucky'),('Tennessee', 19075, NULL, 'Oregon'), +('Maine', 3, NULL, 'Kansas, Kentucky, Iowa'),('Iowa', 1, NULL, 'South Dakota'), +('Kansas', -4037, NULL, 'Virginia'),('Delaware', 22550, NULL, 'Utah'), +('Illinois', 14634, NULL, 'South Carolina, Colorado'), +('Kansas', 6, NULL, 'South Dakota'),('Delaware', 9, NULL, ''), +('', 0, NULL, 'Utah, Delaware, Florida, Georgia, Nevada'), +('Colorado', 8, NULL, 'Montana'),('Maryland', 2689, NULL, 'Hawaii'), +('Florida', -12306, NULL, 'Delaware'), +('Indiana', 38567, NULL, 'Iowa, Minnesota, Maine'), +('Oklahoma', 9, NULL, 'Delaware, Kansas, Oregon, Nebraska, Maryland, Minnesota'), +('Tennessee', 12460, NULL, NULL),('Kentucky', 0, NULL, 'Ohio'), +('Nevada', 7, NULL, 'Vermont, Oregon, Oklahoma, Montana'), +('Nebraska', 61966, NULL, 'Nevada'),('Alaska', 131, NULL, 'Louisiana, Maine'), +('Wisconsin', 4, NULL, 'Nevada'),('South Carolina', 0, NULL, 'Washington'), +('West Virginia', 51314, NULL, 'Ohio'),('Louisiana', 0, NULL, ''), +('Pennsylvania', 0, NULL, 'Iowa, Idaho'),('Arkansas', 14010, NULL, 'Indiana'), +('Wyoming', -15514, NULL, 'Maine'),('Georgia', 0, NULL, 'N/A'), +('Kentucky', 1, NULL, 'Idaho'),('Wyoming', 60249, NULL, 'Indiana, Iowa'), +('Pennsylvania', 69, NULL, 'W'), +('New Mexico', 11480, NULL, 'Florida, Georgia, Hawaii'), +('South Carolina', 9, NULL, 'Iowa'),('Virginia', 0, NULL, 'Connecticut'), +('Mississippi', 19749, NULL, 'Rhode Island'),('Illinois', 5, NULL, 'Virginia'), +('Texas', -1749, NULL, 'Tennessee'),('Arizona', 28, NULL, 'California'), +('Florida', 62151, NULL, 'Kansas'),('California', 172, NULL, 'SC'), +('New Jersey', 0, NULL, 'North Carolina'),('Wyoming', 4, NULL, 'I'), +('Kansas', 10683, NULL, 'California'),('Arkansas', -14275, NULL, 'K'), +('Arizona', 5, NULL, 'California, Delaware, Rhode Island, Maryland'), +('Florida', 0, NULL, 'T'),('Alaska', 241, NULL, 'Virginia'); +ALTER TABLE t1 ENABLE KEYS; +EXPLAIN +SELECT * FROM t1 FORCE KEY (PRIMARY , i , c1 , c2) +WHERE pk = 255 OR i = 22 OR (pk IN (1 , 136) AND c2 IN ('c' , 'w') AND (c1 NOT BETWEEN 'e' AND 'i' OR c2 > 'g')) OR pk != 1 ; +id select_type table type possible_keys key key_len ref rows Extra +1 SIMPLE t1 ALL PRIMARY,c1,i,c2 NULL NULL NULL 69 Using where +DROP TABLE t1; +set optimizer_switch= @optimizer_switch_save; |