查找违反要添加约束的行

Question

我正在尝试向表添加检查约束，例如

ALTER TABLE foo ADD CONSTRAINT bar CHECK (...);

我得到错误：

ERROR:  check constraint "bar" is violated by some row
********** Error **********

ERROR: check constraint "bar" is violated by some row
SQL state: 23514

有没有办法让postgres（9.6）告诉我它在哪一行失败？这会很有帮助。

Answer 1

确定。

Select * from bar where <desired check constraint>;