negation_elimination.test
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:3k
源码类别:
MySQL数据库
开发平台:
Visual C++
- #
- # Test negation elimination
- #
- --disable_warnings
- drop table if exists t1;
- --enable_warnings
- create table t1 (a int, key (a));
- insert into t1 values (NULL), (0), (1), (2), (3), (4), (5), (6), (7), (8), (9),
- (10), (11), (12), (13), (14), (15), (16), (17), (18), (19);
- explain select * from t1 where not(not(a));
- select * from t1 where not(not(a));
- explain select * from t1 where not(not(not(a > 10)));
- select * from t1 where not(not(not(a > 10)));
- explain select * from t1 where not(not(not(a < 5) and not(a > 10)));
- select * from t1 where not(not(not(a < 5) and not(a > 10)));
- explain select * from t1 where not(a = 10);
- select * from t1 where not(a = 10);
- explain select * from t1 where not(a != 10);
- select * from t1 where not(a != 1);
- explain select * from t1 where not(a < 10);
- select * from t1 where not(a < 10);
- explain select * from t1 where not(a >= 10);
- select * from t1 where not(a >= 10);
- explain select * from t1 where not(a > 10);
- select * from t1 where not(a > 10);
- explain select * from t1 where not(a <= 10);
- select * from t1 where not(a <= 10);
- explain select * from t1 where not(a is null);
- select * from t1 where not(a is null);
- explain select * from t1 where not(a is not null);
- select * from t1 where not(a is not null);
- explain select * from t1 where not(a < 5 or a > 15);
- select * from t1 where not(a < 5 or a > 15);
- explain select * from t1 where not(a < 15 and a > 5);
- select * from t1 where not(a < 15 and a > 5);
- explain select * from t1 where a = 2 or not(a < 10);
- select * from t1 where a = 2 or not(a < 10);
- explain select * from t1 where a > 5 and not(a > 10);
- select * from t1 where a > 5 and not(a > 10);
- explain select * from t1 where a > 5 xor a < 10;
- select * from t1 where a > 5 xor a < 10;
- explain select * from t1 where a = 2 or not(a < 5 or a > 15);
- select * from t1 where a = 2 or not(a < 5 or a > 15);
- explain select * from t1 where a = 7 or not(a < 15 and a > 5);
- select * from t1 where a = 7 or not(a < 15 and a > 5);
- explain select * from t1 where NULL or not(a < 15 and a > 5);
- select * from t1 where NULL or not(a < 15 and a > 5);
- explain select * from t1 where not(NULL and a > 5);
- select * from t1 where not(NULL and a > 5);
- explain select * from t1 where not(NULL or a);
- select * from t1 where not(NULL or a);
- explain select * from t1 where not(NULL and a);
- select * from t1 where not(NULL and a);
- explain select * from t1 where not((a < 5 or a < 10) and (not(a > 16) or a > 17));
- select * from t1 where not((a < 5 or a < 10) and (not(a > 16) or a > 17));
- explain select * from t1 where not((a < 5 and a < 10) and (not(a > 16) or a > 17));
- select * from t1 where not((a < 5 and a < 10) and (not(a > 16) or a > 17));
- explain select * from t1 where ((a between 5 and 15) and (not(a like 10)));
- select * from t1 where ((a between 5 and 15) and (not(a like 10)));
- delete from t1 where a > 3;
- select a, not(not(a)) from t1;
- explain extended select a, not(not(a)), not(a <= 2 and not(a)), not(a not like "1"), not (a not in (1,2)), not(a != 2) from t1 where not(not(a)) having not(not(a));
- drop table t1;
- # End of 4.1 tests