Re: delete with index scan

Have you considered a join?

delete from t1 where pkey = t2.pkey;

Also, it appears you never ANALYZEd t2, maybe that would help?

On Tue, Nov 30, 2004 at 04:55:58AM -0500, sar(at)northelectriccompany(dot)com wrote:
> I have a table t1 with a primary key column pkey, and a table t2, with a primary key column pkey. Is there a way to make the following delete use the indexes?
>
> delete from t1 where pkey in (select pkey from t2);
>
> NOTICE: QUERY PLAN:
>
> Seq Scan on t1 (cost=0.00..6616238.99 rows=660239 width=6)
> SubPlan
> -> Seq Scan on t2 (cost=0.00..20.00 rows=1000 width=8)
>
> EXPLAIN
>
>
> thanks,
> Sally
>
> ------------------------------------------
> Sally Ruggero
> Software Development
>
> North Electric Company, Inc.
> 6131 Falls of Neuse Road, Suite 205
> Raleigh, NC 27609
>
> Office: (919) 341-6009
> Fax: (919) 341-6010
>
> Email: sally(dot)ruggero(at)northelectriccompany(dot)com
>
>
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> TIP 8: explain analyze is your friend

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