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* New index_merge EXPLAIN output format
* Fixed a problem with wrong query results for partially covering keys in ROR-index_merge * ROR-intersection retrieval plan choice algorithm now uses less disk IO - and properly processes clustered PK range scans * Fixed several minor range optimizer problems * Added more comments * Code cleanup mysql-test/r/index_merge.result: New index_merge EXPLAIN output format changes mysql-test/r/index_merge_innodb.result: New index_merge EXPLAIN output format changes mysql-test/r/index_merge_ror.result: New index_merge EXPLAIN output format changes Added test for scans on keys that cover fields partially Fixed a minor ROR optimizer problem mysql-test/r/index_merge_ror_cpk.result: More tests added mysql-test/t/index_merge_ror.test: New index_merge EXPLAIN output format changes Added test for scans on keys that cover fields partially Fixed a minor ROR optimizer problem mysql-test/t/index_merge_ror_cpk.test: More tests added mysys/my_bitmap.c: Comments added, code cleanup sql/opt_range.cc: Comments added, code cleanup Numerous fixes, see changeset description sql/opt_range.h: Comments added, code cleanup New index_merge EXPLAIN output format related changes sql/sql_select.cc: Comments added, code cleanup New index_merge EXPLAIN output
This commit is contained in:
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@ -21,7 +21,7 @@ id select_type table type possible_keys key key_len ref rows Extra
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explain
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select * from t0 where key1 < 3 or key2 > 1020;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 31 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 31 Using sort_union(i1,i2); Using where
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select * from t0 where key1 < 3 or key2 > 1020;
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key1 key2 key3 key4 key5 key6 key7 key8
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1 1 1 1 1 1 1 1023
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@ -32,11 +32,11 @@ key1 key2 key3 key4 key5 key6 key7 key8
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1024 1024 1024 1024 1024 1024 1024 0
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explain select * from t0 where key1 < 3 or key2 <4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using sort_union(i1,i2); Using where
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explain
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select * from t0 where (key1 > 30 and key1<35) or (key2 >32 and key2 < 40);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 9 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 9 Using sort_union(i1,i2); Using where
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select * from t0 where (key1 > 30 and key1<35) or (key2 >32 and key2 < 40);
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key1 key2 key3 key4 key5 key6 key7 key8
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31 31 31 31 31 31 31 993
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@ -56,18 +56,18 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 ref i1,i2,i3 i3 4 const 1 Using where
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explain select * from t0 use index (i1,i2) where (key1 < 3 or key2 <4) and key3 = 50;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 7 Using sort_union(i1,i2); Using where
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explain select * from t0 where (key1 > 1 or key2 > 2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 ALL i1,i2 NULL NULL NULL 1024 Using where
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explain select * from t0 force index (i1,i2) where (key1 > 1 or key2 > 2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 1024 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 1024 Using sort_union(i1,i2); Using where
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explain
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select * from t0 where key1<3 or key2<3 or (key1>5 and key1<8) or
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(key1>10 and key1<12) or (key2>100 and key2<110);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 17 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 17 Using sort_union(i1,i2); Using where
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explain select * from t0 where key2 = 45 or key1 <=> null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 range i1,i2 i2 4 NULL 1 Using where
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@ -79,26 +79,26 @@ id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 range i1,i2 i2 4 NULL 1 Using where
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explain select * from t0 where key2=10 or key3=3 or key4 <=> null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i2,i3,i4 i2,i3 4,4 NULL 2 Using where
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1 SIMPLE t0 index_merge i2,i3,i4 i2,i3 4,4 NULL 2 Using union(i2,i3); Using where
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explain select * from t0 where key2=10 or key3=3 or key4 is null;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i2,i3,i4 i2,i3 4,4 NULL 2 Using where
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1 SIMPLE t0 index_merge i2,i3,i4 i2,i3 4,4 NULL 2 Using union(i2,i3); Using where
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explain select key1 from t0 where (key1 <=> null) or (key2 < 5) or
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(key3=10) or (key4 <=> null);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i4 i2,i3 4,4 NULL 6 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i4 i2,i3 4,4 NULL 6 Using sort_union(i2,i3); Using where
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explain select key1 from t0 where (key1 <=> null) or (key1 < 5) or
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(key3=10) or (key4 <=> null);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i3,i4 i1,i3 4,4 NULL 5 Using where
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1 SIMPLE t0 index_merge i1,i3,i4 i1,i3 4,4 NULL 5 Using sort_union(i1,i3); Using where
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explain select * from t0 where
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(key1 < 3 or key2 < 3) and (key3 < 4 or key4 < 4) and (key5 < 5 or key6 < 5);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i4,i5,i6 i1,i2 4,4 NULL 6 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i4,i5,i6 i1,i2 4,4 NULL 6 Using sort_union(i1,i2); Using where
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explain
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select * from t0 where (key1 < 3 or key2 < 6) and (key1 < 7 or key3 < 4);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 9 Using where
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1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 9 Using sort_union(i1,i2); Using where
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select * from t0 where (key1 < 3 or key2 < 6) and (key1 < 7 or key3 < 4);
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key1 key2 key3 key4 key5 key6 key7 key8
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1 1 1 1 1 1 1 1023
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@ -109,7 +109,7 @@ key1 key2 key3 key4 key5 key6 key7 key8
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explain select * from t0 where
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(key1 < 3 or key2 < 3) and (key3 < 4 or key4 < 4) and (key5 < 2 or key6 < 2);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i4,i5,i6 i1,i2 4,4 NULL 6 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i4,i5,i6 i1,i2 4,4 NULL 6 Using sort_union(i1,i2); Using where
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explain select * from t0 where
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(key1 < 3 or key2 < 3) and (key3 < 100);
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id select_type table type possible_keys key key_len ref rows Extra
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@ -129,7 +129,7 @@ explain select * from t0 where
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or
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key1 < 7;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 10 Using where
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1 SIMPLE t0 index_merge i1,i2,i3 i1,i2 4,4 NULL 10 Using sort_union(i1,i2); Using where
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select * from t0 where
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((key1 < 4 or key2 < 4) and (key2 <5 or key3 < 4))
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or
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@ -146,25 +146,25 @@ explain select * from t0 where
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or
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((key5 < 5 or key6 < 6) and (key7 <7 or key8 < 4));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7,i8 i1,i2,i5,i6 4,4,4,4 NULL 19 Using where
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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
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explain select * from t0 where
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((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4))
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or
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((key7 <7 or key8 < 4) and (key5 < 5 or key6 < 6));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7,i8 i3,i5,i7,i8 4,4,4,4 NULL 21 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7,i8 i3,i5,i7,i8 4,4,4,4 NULL 21 Using sort_union(i3,i5,i7,i8); Using where
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explain select * from t0 where
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((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4))
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or
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((key3 <7 or key5 < 2) and (key5 < 5 or key6 < 6));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6 i3,i5 4,4 NULL 11 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6 i3,i5 4,4 NULL 11 Using sort_union(i3,i5); Using where
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explain select * from t0 where
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((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4))
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or
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(((key3 <7 and key7 < 6) or key5 < 2) and (key5 < 5 or key6 < 6));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7 i3,i5 4,4 NULL 11 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6,i7 i3,i5 4,4 NULL 11 Using sort_union(i3,i5); Using where
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explain select * from t0 where
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((key3 <5 or key5 < 4) and (key1 < 4 or key2 < 4))
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or
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@ -176,7 +176,7 @@ explain select * from t0 force index(i1, i2, i3, i4, i5, i6 ) where
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or
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((key3 >=5 or key5 < 2) and (key5 < 5 or key6 < 6));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6 i3,i5 0,4 NULL 1024 Using where
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1 SIMPLE t0 index_merge i1,i2,i3,i5,i6 i3,i5 0,4 NULL 1024 Using sort_union(i3,i5); Using where
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select * from t0 where key1 < 5 or key8 < 4 order by key1;
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key1 key2 key3 key4 key5 key6 key7 key8
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1 1 1 1 1 1 1 1023
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@ -190,7 +190,7 @@ key1 key2 key3 key4 key5 key6 key7 key8
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explain
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select * from t0 where key1 < 5 or key8 < 4 order by key1;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i8 i1,i8 4,4 NULL 9 Using where; Using filesort
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1 SIMPLE t0 index_merge i1,i8 i1,i8 4,4 NULL 9 Using sort_union(i1,i8); Using where; Using filesort
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create table t2 like t0;
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insert into t2 select * from t0;
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alter table t2 add index i1_3(key1, key3);
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@ -200,7 +200,7 @@ alter table t2 drop index i2;
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alter table t2 add index i321(key3, key2, key1);
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explain select key3 from t2 where key1 = 100 or key2 = 100;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index_merge i1_3,i2_3 i1_3,i2_3 4,4 NULL 2 Using where
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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
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explain select key3 from t2 where key1 <100 or key2 < 100;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t2 index i1_3,i2_3 i321 12 NULL 1024 Using where; Using index
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@ -226,7 +226,7 @@ key1a key1b key2 key2_1 key2_2 key3
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4 4 0 4 4 4
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explain select * from t4 where key1a = 3 or key1b = 4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t4 index_merge i1a,i1b i1a,i1b 4,4 NULL 2 Using where
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1 SIMPLE t4 index_merge i1a,i1b i1a,i1b 4,4 NULL 2 Using sort_union(i1a,i1b); Using where
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explain select * from t4 where key2 = 1 and (key2_1 = 1 or key3 = 5);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t4 ref i2_1,i2_2 i2_1 4 const 10 Using where
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@ -241,7 +241,7 @@ insert into t1 select * from t0;
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explain select * from t0 left join t1 on (t0.key1=t1.key1)
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where t0.key1=3 or t0.key2=4;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where
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1 SIMPLE t1 ref i1 i1 4 test.t0.key1 1
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select * from t0 left join t1 on (t0.key1=t1.key1)
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where t0.key1=3 or t0.key2=4;
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@ -251,13 +251,13 @@ key1 key2 key3 key4 key5 key6 key7 key8 key1 key2 key3 key4 key5 key6 key7 key8
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explain
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select * from t0,t1 where (t0.key1=t1.key1) and ( t0.key1=3 or t0.key2=4);
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id select_type table type possible_keys key key_len ref rows Extra
|
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using where
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1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where
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1 SIMPLE t1 ref i1 i1 4 test.t0.key1 1
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explain
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select * from t0,t1 where (t0.key1=t1.key1) and
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(t0.key1=3 or t0.key2=4) and t1.key1<200;
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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 where
|
||||
1 SIMPLE t0 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where
|
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1 SIMPLE t1 ref i1 i1 4 test.t0.key1 1 Using where
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explain
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select * from t0,t1 where (t0.key1=t1.key1) and
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@ -269,7 +269,7 @@ explain select * from t0,t1 where t0.key1 = 5 and
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(t1.key1 = t0.key1 or t1.key8 = t0.key1);
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id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t0 ref i1 i1 4 const 1 Using where
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1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using where
|
||||
1 SIMPLE t1 index_merge i1,i8 i1,i8 4,4 NULL 2 Using union(i1,i8); Using where
|
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explain select * from t0,t1 where t0.key1 < 3 and
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(t1.key1 = t0.key1 or t1.key8 = t0.key1);
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id select_type table type possible_keys key key_len ref rows Extra
|
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@ -278,12 +278,12 @@ id select_type table type possible_keys key key_len ref rows Extra
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explain select * from t1 where key1=3 or key2=4
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union select * from t1 where key1<4 or key3=5;
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id select_type table type possible_keys key key_len ref rows Extra
|
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1 PRIMARY t1 index_merge i1,i2 i1,i2 4,4 NULL 2 Using where
|
||||
2 UNION t1 index_merge i1,i3 i1,i3 4,4 NULL 5 Using where
|
||||
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
|
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explain select * from (select * from t1 where key1 = 3 or key2 =3) as Z where key8 >5;
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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 where
|
||||
2 DERIVED t1 index_merge i1,i2 i1,i2 4,4 NULL 2 Using union(i1,i2); Using where
|
||||
create table t3 like t0;
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insert into t3 select * from t0;
|
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alter table t3 add key9 int not null, add index i9(key9);
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@ -296,7 +296,7 @@ key1=1 or key2=2 or key3=3 or key4=4 or
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key5=5 or key6=6 or key7=7 or key8=8 or
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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 where
|
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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
|
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select * from t3 where
|
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key1=1 or key2=2 or key3=3 or key4=4 or
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key5=5 or key6=6 or key7=7 or key8=8 or
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@ -316,7 +316,7 @@ key1 key2 key3 key4 key5 key6 key7 key8 key9 keyA keyB keyC
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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 where
|
||||
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
|
||||
|
||||
@ -8,7 +8,7 @@ INDEX i2(key2),
|
||||
) engine=innodb;
|
||||
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 8 Using where
|
||||
1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
|
||||
select * from t1 where key1 < 5 or key2 > 197;
|
||||
key1 key2
|
||||
0 200
|
||||
@ -18,7 +18,7 @@ key1 key2
|
||||
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 8 Using where
|
||||
1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
|
||||
select * from t1 where key1 < 3 or key2 > 195;
|
||||
key1 key2
|
||||
0 200
|
||||
@ -34,7 +34,7 @@ update t1 set str1='aaa', str2='bbb', str3=concat(key2, '-', key1 div 2, '_' ,if
|
||||
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 8 Using where
|
||||
1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
|
||||
select * from t1 where key1 < 5 or key2 > 197;
|
||||
key1 key2 str1 zeroval str2 str3
|
||||
4 196 aaa 0 bbb 196-2_a
|
||||
@ -44,7 +44,7 @@ key1 key2 str1 zeroval str2 str3
|
||||
0 200 aaa 0 bbb 200-0_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 8 Using where
|
||||
1 SIMPLE t1 index_merge i1,i2 i1,i2 4,4 NULL 8 Using sort_union(i1,i2); Using where
|
||||
select * from t1 where key1 < 3 or key2 > 195;
|
||||
key1 key2 str1 zeroval str2 str3
|
||||
4 196 aaa 0 bbb 196-2_a
|
||||
|
||||
@ -1,16 +1,16 @@
|
||||
drop table if exists t1,t0;
|
||||
drop table if exists t0,t1,t2;
|
||||
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 3 Using where; Using index
|
||||
1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 3 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 8 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 8 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
|
||||
@ -18,21 +18,21 @@ insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, -1, -1, 'key1
|
||||
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 3 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 3 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 3 Using where; Using index
|
||||
1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 3 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 8 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 8 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
|
||||
@ -40,7 +40,7 @@ key1 key2 key3 key4
|
||||
-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 8 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 8 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
|
||||
@ -48,14 +48,14 @@ key1 key2 key3 key4 filler1
|
||||
-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 1 Using where; Using index
|
||||
1 SIMPLE t1 index_merge key1,key2,key3 key1,key2,key3 5,5,5 NULL 1 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 5 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3 key1,key2,key3 5,5,5 NULL 5 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
|
||||
@ -72,19 +72,19 @@ 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 8 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 8 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 8 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key1,key2,key3,key4 5,5,5,5 NULL 8 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 3 Using where; Using index
|
||||
1 SIMPLE t1 index_merge key1,key2 key1,key2 5,5 NULL 3 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');
|
||||
@ -92,7 +92,7 @@ insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key
|
||||
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 16 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key3,key1,key2,key4 5,5,5,5 NULL 16 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
|
||||
@ -101,7 +101,7 @@ key1 key2 key3 key4 filler1
|
||||
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 18 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key3,key1,key2,key4 5,5,5,5 NULL 18 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
|
||||
@ -111,7 +111,7 @@ key1 key2 key3 key4 filler1
|
||||
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 20 Using where
|
||||
1 SIMPLE t1 index_merge key1,key2,key3,key4 key3,key1,key2,key4 5,5,5,5 NULL 20 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
|
||||
@ -121,10 +121,10 @@ key1 key2 key3 key4 filler1
|
||||
-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 2508 Using where
|
||||
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 2508 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 2508 Using where; Using index
|
||||
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 2508 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 14720 Using where
|
||||
@ -136,33 +136,60 @@ 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_swt1b 8 const,const 3757 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 42 Using where
|
||||
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 42 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 42 Using where
|
||||
1 SIMPLE t1 index_merge sta_swt12a,sta_swt1a,sta_swt2a,st_a,stb_swt1b,st_b sta_swt12a,stb_swt1b 12,8 NULL 42 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,stb_swt1b 8,8 NULL 163 Using where
|
||||
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 41 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,st_b 8,4 NULL 640 Using where
|
||||
1 SIMPLE t1 index_merge sta_swt1a,sta_swt2a,st_a,st_b sta_swt1a,sta_swt2a,st_b 8,8,4 NULL 159 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 42 Using where
|
||||
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 42 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 163 Using where
|
||||
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 163 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 163 Using where; Using index
|
||||
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 163 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 163 Using where; Using index
|
||||
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 163 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
|
||||
explain select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
|
||||
id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t2 ref a,b a 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
|
||||
|
||||
@ -41,7 +41,7 @@ pk1 pk2 key1 key2 pktail1ok pktail2ok pktail3bad pktail4bad pktail5bad pk2copy b
|
||||
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 where; Using index
|
||||
1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where; Using index
|
||||
select pk1,pk2 from t1 where key1 = 10 and key2=10 and 2*pk1+1 < 2*96+1;
|
||||
pk1 pk2
|
||||
95 50
|
||||
@ -59,13 +59,19 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref key1 key1 4 const 101 Using where
|
||||
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 index_merge PRIMARY,key1 key1,PRIMARY 4,4 NULL 38 Using where
|
||||
1 SIMPLE t1 index_merge PRIMARY,key1 key1,PRIMARY 4,4 NULL 38 Using intersect(key1,PRIMARY); Using where
|
||||
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 index_merge key1,pktail1ok key1,pktail1ok 4,4 NULL 1 Using where
|
||||
1 SIMPLE t1 index_merge key1,pktail1ok key1,pktail1ok 4,4 NULL 1 Using intersect(key1,pktail1ok); 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 index_merge key1,pktail2ok key1,pktail2ok 4,4 NULL 1 Using where
|
||||
1 SIMPLE t1 index_merge key1,pktail2ok key1,pktail2ok 4,4 NULL 1 Using intersect(key1,pktail2ok); Using where
|
||||
select ' The following is actually a deficiency, it uses sort_union currently:' as 'note:';
|
||||
note:
|
||||
The following is actually a deficiency, it uses sort_union currently:
|
||||
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 199 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 98 Using where
|
||||
@ -77,7 +83,7 @@ id select_type table type possible_keys key key_len ref rows Extra
|
||||
1 SIMPLE t1 ref key1,pktail5bad pktail5bad 4 const 99 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 where; Using index
|
||||
1 SIMPLE t1 index_merge key1,key2 key1,key2 4,4 NULL 1 Using intersect(key1,key2); Using where; Using index
|
||||
select pk1,pk2,key1,key2 from t1 where key1 = 10 and key2=10 limit 10;
|
||||
pk1 pk2 key1 key2
|
||||
95 50 10 10
|
||||
|
||||
@ -2,7 +2,7 @@
|
||||
# ROR-index_merge tests.
|
||||
#
|
||||
--disable_warnings
|
||||
drop table if exists t1,t0;
|
||||
drop table if exists t0,t1,t2;
|
||||
--enable_warnings
|
||||
--disable_query_log
|
||||
create table t1
|
||||
@ -213,3 +213,37 @@ explain select st_a from t1
|
||||
|
||||
drop table t0,t1;
|
||||
|
||||
# 'Partially' covered fields test
|
||||
|
||||
create table t2 (
|
||||
a char(10),
|
||||
b char(10),
|
||||
filler1 char(255),
|
||||
filler2 char(255),
|
||||
key(a(5)),
|
||||
key(b(5))
|
||||
);
|
||||
|
||||
--disable_query_log
|
||||
let $1=8;
|
||||
while ($1)
|
||||
{
|
||||
eval insert into t2 values (repeat(char($1+64), 8),repeat(char($1+64), 8),'filler1', 'filler2');
|
||||
dec $1;
|
||||
}
|
||||
insert into t2 select * from t2;
|
||||
insert into t2 select * from t2;
|
||||
--enable_query_log
|
||||
|
||||
# The table row buffer is reused. Fill it with rows that don't match.
|
||||
select count(a) from t2 where a='BBBBBBBB';
|
||||
select count(a) from t2 where b='BBBBBBBB';
|
||||
|
||||
# BUG#1:
|
||||
explain select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
|
||||
select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
|
||||
select count(a) from t2 ignore index(a,b) where a='AAAAAAAA' and b='AAAAAAAA';
|
||||
|
||||
insert into t2 values ('ab', 'ab', 'uh', 'oh');
|
||||
explain select a from t2 where a='ab';
|
||||
drop table t2;
|
||||
|
||||
@ -69,6 +69,9 @@ explain select * from t1 where pk1 < 7500 and key1 = 10;
|
||||
explain select * from t1 where pktail1ok=1 and key1=10;
|
||||
explain select * from t1 where pktail2ok=1 and key1=10;
|
||||
|
||||
select ' The following is actually a deficiency, it uses sort_union currently:' as 'note:';
|
||||
explain select * from t1 where (pktail2ok=1 and pk1< 50000) or key1=10;
|
||||
|
||||
explain select * from t1 where pktail3bad=1 and key1=10;
|
||||
explain select * from t1 where pktail4bad=1 and key1=10;
|
||||
explain select * from t1 where pktail5bad=1 and key1=10;
|
||||
|
||||
Reference in New Issue
Block a user