Re: BUG #1266: Improper unique constraint / MVCC activities

On Thu, 23 Sep 2004, PostgreSQL Bugs List wrote:

> /* ======== */
> --case 1 prepare
> delete from buggy_uq;
> insert into buggy_uq values (1);
> insert into buggy_uq values (2);
> --case 1 test
> update buggy_uq set i = i + 1;
> select * from buggy_uq;
> --expect - SUCCESS
> --result - ERROR:  duplicate key violates unique constraint "buggy_uq_i_key"

This is a known issue with the unique constraint.

> --case 2 prepare
> --case 3 prepare

I seem to get foreign key violations on both of these on both 7.4.x and
8.0 cvs using the scripts you provided just by running them in psql. I
think you need to give more details about what you were trying.