Re: Stored Procedure to Delete Rows and Return Count

"Jonathan S. Katz" <[email protected]> Wed, 29 Aug 2018 17:50:29 -0400

Newsgroups	gmane.comp.db.postgresql.sql
Message-ID	<[email protected]>

> On Aug 29, 2018, at 5:46 PM, Dave Bolt <[email protected]> wrote:
> 
> I am (unfortunately) using PG 8.4
> I have created a simple stored procedure to delete records from a table but while it deletes the records it does not return the number of rows deleted.
> I experimented and searched The Internet, and came up with this solution.
> 
> CREATE OR REPLACE FUNCTION testdel(integer) RETURNS bigint AS $$
> with d as (delete from foo where id=$1 RETURNING *)
> select count(*)
> $$ LANGUAGE SQL;
> 
> Unfortunately this thinks that DELETE is a syntax error.
> 
> I tried the following SQL statement in phpPgAdmin (found in an answer on stackoverflow.com <http://stackoverflow.com/>). This also conforms to my understanding of WITH Queries, PostgreSQL Documentation 8.4.22
> 
> WITH d AS (DELETE FROM foo WHERE id='1' RETURNING *) SELECT count(*);
> 
> and the result was a syntax error on the keyword DELETE, as above.
> 
> This statement was accepted as working in stackoverflow.com <http://stackoverflow.com/>, but doesn't work for me.
> 
> Can someone give me a clue how this can be done and confirm that their solution has been tested so I know it's my end that has the problem, or better yet tell me what I'm doing wrong.

Being able to use a DELETE in a CTE was introduced in PostgreSQL 9.1.

Jonathan

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