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Re: partial index + select query performance
- From: "A. Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
- To: pgsql-performance(at)postgresql(dot)org
- Subject: Re: partial index + select query performance
- Date: Thu, 13 Mar 2008 08:33:46 +0100
am Thu, dem 13.03.2008, um 12:51:54 +0530 mailte petchimuthu lingam folgendes: > > I have created partial index on a field with conditions, if field _a > 200 > and field_a < 300. > > I using the select query with condition as field_a in ( 100, 250, 289, ), > > Will it use the index. Why do you ask us, ask your PG, simple type explain select ... from ... where field_a in ( 100, 250, 289 ) PG shows you the execution plan. But i guess, the index are not used, because the value 100 are not in the index. Andreas -- Andreas Kretschmer Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header) GnuPG-ID: 0x3FFF606C, privat 0x7F4584DA http://wwwkeys.de.pgp.net
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