constraints.test
上传用户:romrleung
上传日期:2022-05-23
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文件大小:1k
- #
- # Testing of constraints
- # Currently MySQL only ignores the syntax.
- #
- --disable_warnings
- drop table if exists t1;
- --enable_warnings
- create table t1 (a int check (a>0));
- insert into t1 values (1);
- insert into t1 values (0);
- drop table t1;
- create table t1 (a int ,b int, check a>b);
- insert into t1 values (1,0);
- insert into t1 values (0,1);
- drop table t1;
- create table t1 (a int ,b int, constraint abc check (a>b));
- insert into t1 values (1,0);
- insert into t1 values (0,1);
- drop table t1;
- create table t1 (a int null);
- insert into t1 values (1),(NULL);
- drop table t1;
- create table t1 (a int null);
- alter table t1 add constraint constraint_1 unique (a);
- alter table t1 add constraint unique key_1(a);
- alter table t1 add constraint constraint_2 unique key_2(a);
- show create table t1;
- drop table t1;
- # End of 4.1 tests