Обсуждение: bitmap heap scanning

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bitmap heap scanning

От
"petchimuthu lingam"
Дата:
How to enable bitmap heap scanning, my query is not using the scanning, i am using postgresql 8.1 version.
i have enabled the option in the postgresql.conf, but still it is not using.

--
With Best Regards,
Petchimuthulingam S

Re: bitmap heap scanning

От
"Scott Marlowe"
Дата:
On Mon, Mar 24, 2008 at 4:13 AM, petchimuthu lingam <spmlingam@gmail.com> wrote:
> How to enable bitmap heap scanning, my query is not using the scanning, i am
> using postgresql 8.1 version.
> i have enabled the option in the postgresql.conf, but still it is not using.

It's likely enabled, but the query planner thinks that another method
of doing things.  What does explain analyze select ... say about your
query plan?