Re: Very bad plan when using VIEW and IN (SELECT...*) - Mailing list pgsql-performance

"Carlo Stonebanks" <stonec.register@sympatico.ca> wrote:

> SELECT *
> FROM mdx_core.vw_provider AS p
> WHERE provider_id IN (SELECT 13083101)
>
> I am using the simple IN (SELECT n) in QUERY 2 to simplify the
> problem. I noticed the oddity of the behaviour when I used a
> proper "IN (SELECT myId FROM myTable)"

Did you try?:

SELECT *
FROM mdx_core.vw_provider AS p
WHERE EXISTS (SELECT * FROM myTable WHERE myId = provider_id)

For any follow-up you should probably mention what version of
PostgreSQL this is and how it's configured.

http://wiki.postgresql.org/wiki/SlowQueryQuestions

-Kevin