You didn't mention version, but 8.1.x has bitmap index scans that might
greatly speed this up...
On Sat, Apr 22, 2006 at 02:34:13PM -0700, clemens.bertschler@gmail.com wrote:
> Hi List
> I have maybe an easy question but i do not find an answer, i have this
> SQL query:
>
> SELECT geom,group,production_facs FROM south_america
> WHERE municipio = ''
> OR municipio = 'ACRE'
> OR municipio = 'ADJUNTAS'
> OR municipio = 'AGUADA'
>
> The performance of this query is quite worse as longer it gets, its
> possible that this query gets over 20 to 30 OR comparisons, but then
> the performance is really worse, is it possible to speed it up?
> Thanks
> Clemens
>
>
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Jim C. Nasby, Sr. Engineering Consultant jnasby@pervasive.com
Pervasive Software http://pervasive.com work: 512-231-6117
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