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Diffstat (limited to 'mysql-test/r/index_merge.result')
| -rw-r--r-- | mysql-test/r/index_merge.result | 386 |
1 files changed, 386 insertions, 0 deletions
diff --git a/mysql-test/r/index_merge.result b/mysql-test/r/index_merge.result new file mode 100644 index 00000000000..d039d5a04c9 --- /dev/null +++ b/mysql-test/r/index_merge.result @@ -0,0 +1,386 @@ +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 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 +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 where +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 range i1,i2,i3 i3 4 NULL 95 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 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 +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 <100 or key2 < 100; +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 ALL i1_3,i2_3 NULL NULL NULL 1024 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) +); +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 ALL i1,i2 NULL NULL NULL 1024 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 +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 where +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 +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> system NULL NULL NULL NULL 1 +2 DERIVED t1 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where +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= 4000; +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 +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 +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, 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 +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, 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; |