limit.test
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上传日期:2022-05-23
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文件大小:1k
- #
- # Test of update and delete with limit
- #
- --disable_warnings
- drop table if exists t1;
- --enable_warnings
- create table t1 (a int primary key, b int not null);
- insert into t1 () values (); -- Testing default values
- insert into t1 values (1,1),(2,1),(3,1);
- update t1 set a=4 where b=1 limit 1;
- select * from t1;
- update t1 set b=2 where b=1 limit 2;
- select * from t1;
- update t1 set b=4 where b=1;
- select * from t1;
- delete from t1 where b=2 limit 1;
- select * from t1;
- delete from t1 limit 1;
- select * from t1;
- drop table t1;
- create table t1 (i int);
- insert into t1 (i) values(1),(1),(1);
- delete from t1 limit 1;
- update t1 set i=2 limit 1;
- delete from t1 limit 0;
- update t1 set i=3 limit 0;
- select * from t1;
- drop table t1;
- # LIMIT 0
- select 0 limit 0;
- #
- # Test with DELETE, ORDER BY and limit (bug #1024)
- #
- CREATE TABLE t1(id int auto_increment primary key, id2 int, index(id2));
- INSERT INTO t1 (id2) values (0),(0),(0);
- DELETE FROM t1 WHERE id=1;
- INSERT INTO t1 SET id2=0;
- SELECT * FROM t1;
- DELETE FROM t1 WHERE id2 = 0 ORDER BY id LIMIT 1;
- # should have deleted WHERE id=2
- SELECT * FROM t1;
- DELETE FROM t1 WHERE id2 = 0 ORDER BY id desc LIMIT 1;
- SELECT * FROM t1;
- DROP TABLE t1;
- #
- # Bug#8023 - limit on UNION with from DUAL, causes syntax error
- #
- create table t1 (a integer);
- insert into t1 values (1);
- # both queries must return one row
- select 1 as a from t1 union all select 1 from dual limit 1;
- (select 1 as a from t1) union all (select 1 from dual) limit 1;
- drop table t1;
- # End of 4.1 tests