Re: multi column query

On Wed, Apr 12, 2006 at 05:32:32PM -0700, Sriram Dandapani wrote:
> Hi
>
> When I update a table that has 20 columns and the where clause includes
> 16 of the columns (this is a data warehousing type update on aggregate
> fields),
>
> The bitmap scan is not used by the optimizer. The table is indexed on 3
> of the 20 fields. The update takes really long to finish (on a 6 million
> row table)
>
> Do I need to do some "magic" with configuration to turn on bitmap scans.

No. What's explain analyze of the query show? What's it doing now?
Seqscan? You might try set enable_seqscan=off and see what that does.
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Jim C. Nasby, Sr. Engineering Consultant jnasby(at)pervasive(dot)com
Pervasive Software http://pervasive.com work: 512-231-6117
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