PostgreSQL数据库表中存在重复的唯一约束
我无意中(在数据库迁移期间)在列上创建了一个唯一约束,该约束已经定义了相同的唯一约束。基本上我是这样结束的:PostgreSQL数据库表中存在重复的唯一约束,postgresql,Postgresql,我无意中(在数据库迁移期间)在列上创建了一个唯一约束,该约束已经定义了相同的唯一约束。基本上我是这样结束的: => select * from information_schema.table_constraints where table_name = 'users' and constraint_type = 'UNIQUE'; constraint_catalog | constraint_schema | constraint_name | table_catalog | ta
=> select * from information_schema.table_constraints where table_name = 'users' and constraint_type = 'UNIQUE';
constraint_catalog | constraint_schema | constraint_name | table_catalog | table_schema | table_name | constraint_type | is_deferrable | initially_deferred
--------------------+-------------------+------------------+---------------+--------------+------------+-----------------+---------------+--------------------
fo-auth | public | users_email_key | fo-auth | public | users | UNIQUE | NO | NO
fo-auth | public | users_email_key1 | fo-auth | public | users | UNIQUE | NO | NO
(2 rows)
这是一个值得担心的问题,还是我可以接受它?只要去掉多余的约束:
alter table users drop constraint users_email_key1;
两个相同的约束不会造成任何伤害,但会不必要地延长插入和更新的时间