pgsql: Adjust OR indexscan logic to not generate redundant

From: tgl(at)svr1(dot)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Adjust OR indexscan logic to not generate redundant
Date: 2005-03-01 01:40:52
Message-ID: 20050301014052.4C182564C4@svr1.postgresql.org
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Log Message:
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Adjust OR indexscan logic to not generate redundant condition-free OR
indexscans involving partial indexes. These would always be dominated
by a simple indexscan on such an index, so there's no point in considering
them. Fixes overoptimism in a patch I applied last October.

Tags:
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REL8_0_STABLE

Modified Files:
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pgsql/src/backend/optimizer/path:
orindxpath.c (r1.64 -> r1.64.4.1)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/orindxpath.c.diff?r1=1.64&r2=1.64.4.1)

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