Re: drop constraint primary key

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: marie(dot)tuite(at)edisonaffiliates(dot)com
Cc: "Pgsql-Sql(at)Postgresql(dot) Org" <pgsql-sql(at)postgresql(dot)org>
Subject: Re: drop constraint primary key
Date: 2002-10-03 17:09:38
Message-ID: 10247.1033664978@sss.pgh.pa.us
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"Marie G. Tuite" <marie(dot)tuite(at)edisonaffiliates(dot)com> writes:
> Running above, am trying to drop the primary key, but get the follwing
> error.
> project=# alter table class_teacher_rlt drop constraint
> class_teacher_rlt_pkey restrict;
> ERROR: ALTER TABLE / DROP CONSTRAINT: class_teacher_rlt_pkey does not exist

In 7.2 DROP CONSTRAINT only works for CHECK-type constraints; you'll
have to drop the underlying index directly to get rid of a
primary-key-type constraint.

7.3 does allow DROP CONSTRAINT for this.

regards, tom lane

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