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ram@gw.mysql.r18.ru
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WL #1056: Eliminate NOT operators from where condition
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10 files changed

+638
-8
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10 files changed

+638
-8
lines changed

‎mysql-test/r/bool.result

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@@ -42,9 +42,6 @@ SELECT * FROM t1 WHERE a=2 OR (NULL AND (@a:=@a+1));
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SELECT * FROM t1 WHERE NOT(a=2 OR (NULL AND (@b:=@b+1)));
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a
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SELECT @a, @b;
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@a @b
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DROP TABLE t1;
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create table t1 (a int, b int);
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insert into t1 values(null, null), (0, null), (1, null), (null, 0), (null, 1), (0, 0), (0, 1), (1, 0), (1, 1);

‎mysql-test/r/negation_elimination.result

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drop table if exists t1;
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create table t1 (a int, key (a));
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insert into t1 values (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9),
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(10), (11), (12), (13), (14), (15), (16), (17), (18), (19);
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explain select * from t1 where not(not(a));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL a 5 NULL 21 Using where; Using index
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select * from t1 where not(not(a));
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a
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explain select * from t1 where not(not(not(a > 10)));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 10 Using where; Using index
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select * from t1 where not(not(not(a > 10)));
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a
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explain select * from t1 where not(not(not(a < 5) and not(a > 10)));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 5 Using where; Using index
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select * from t1 where not(not(not(a < 5) and not(a > 10)));
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a
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explain select * from t1 where not(a = 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL a 5 NULL 21 Using where; Using index
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select * from t1 where not(a = 10);
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explain select * from t1 where not(a != 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a a 5 const 1 Using where; Using index
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select * from t1 where not(a != 1);
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a
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1
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explain select * from t1 where not(a < 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 11 Using where; Using index
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select * from t1 where not(a < 10);
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explain select * from t1 where not(a >= 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 9 Using where; Using index
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select * from t1 where not(a >= 10);
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explain select * from t1 where not(a > 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 10 Using where; Using index
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select * from t1 where not(a > 10);
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a
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explain select * from t1 where not(a <= 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 10 Using where; Using index
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select * from t1 where not(a <= 10);
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explain select * from t1 where not(a 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 t1 range a a 5 NULL 20 Using where; Using index
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select * from t1 where not(a is null);
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explain select * from t1 where not(a is not null);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 ref a a 5 const 1 Using where; Using index
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select * from t1 where not(a is not null);
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a
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NULL
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explain select * from t1 where not(a < 5 or a > 15);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 10 Using where; Using index
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select * from t1 where not(a < 5 or a > 15);
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explain select * from t1 where not(a < 15 and a > 5);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 12 Using where; Using index
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select * from t1 where not(a < 15 and a > 5);
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explain select * from t1 where a = 2 or not(a < 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 12 Using where; Using index
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select * from t1 where a = 2 or not(a < 10);
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explain select * from t1 where a > 5 and not(a > 10);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 4 Using where; Using index
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select * from t1 where a > 5 and not(a > 10);
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explain select * from t1 where a > 5 xor a < 10;
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL a 5 NULL 21 Using where; Using index
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select * from t1 where a > 5 xor a < 10;
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explain select * from t1 where a = 2 or not(a < 5 or a > 15);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 11 Using where; Using index
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select * from t1 where a = 2 or not(a < 5 or a > 15);
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explain select * from t1 where a = 7 or not(a < 15 and a > 5);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 13 Using where; Using index
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select * from t1 where a = 7 or not(a < 15 and a > 5);
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a
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explain select * from t1 where NULL or not(a < 15 and a > 5);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 12 Using where; Using index
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select * from t1 where NULL or not(a < 15 and a > 5);
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explain select * from t1 where not(NULL and a > 5);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 6 Using where; Using index
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select * from t1 where not(NULL and a > 5);
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explain select * from t1 where not(NULL or a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE NULL NULL NULL NULL NULL NULL NULL Impossible WHERE
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select * from t1 where not(NULL or a);
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explain select * from t1 where not(NULL and a);
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 index NULL a 5 NULL 21 Using where; Using index
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select * from t1 where not(NULL and a);
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explain select * from t1 where not((a < 5 or a < 10) and (not(a > 16) or a > 17));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 11 Using where; Using index
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select * from t1 where not((a < 5 or a < 10) and (not(a > 16) or a > 17));
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explain select * from t1 where not((a < 5 and a < 10) and (not(a > 16) or a > 17));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 15 Using where; Using index
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select * from t1 where not((a < 5 and a < 10) and (not(a > 16) or a > 17));
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explain select * from t1 where ((a between 5 and 15) and (not(a like 10)));
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id select_type table type possible_keys key key_len ref rows Extra
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1 SIMPLE t1 range a a 5 NULL 10 Using where; Using index
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select * from t1 where ((a between 5 and 15) and (not(a like 10)));
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drop table t1;

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