On Thu, Dec 04, 2003 at 08:23:36PM +0000, Richard Huxton wrote:
> Ah - it's probably not the update but the IN. You can rewrite it using PG's
> non-standard FROM:
>
> UPDATE t1 SET status='done' FROM t_tmp WHERE t1.rec_id = t_tmp.rec_id;
Thanks for the hint. I'll try this.
> Now that doesn't explain why the update is taking so long. One fifth of a
> second is extremely slow. Are you certain that the index is being used?
Explain shows following output:
explain update table1 set status = 'PROC' where recid = '199901';
Index Scan using table1_pkey on table1 (cost=0.00..6.01 rows=1 width=198)
Index Cond: (recid = 199901::bigint)
(2 rows)
--
Ivar Zarans
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