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pgsql: Fix set_joinrel_size_estimates() to estimate outer-join sizes

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix set_joinrel_size_estimates() to estimate outer-join sizes
Date: 2006-11-10 01:21:41
Message-ID: 20061110012141.56D7E9FB256@postgresql.org (view raw or flat)
Thread:
Lists: pgsql-committers
Log Message:
-----------
Fix set_joinrel_size_estimates() to estimate outer-join sizes more
accurately: we have to distinguish the effects of the join's own ON
clauses from the effects of pushed-down clauses.  Failing to do so
was a quick hack long ago, but it's time to be smarter.  Per example
from Thomas H.

Modified Files:
--------------
    pgsql/src/backend/optimizer/path:
        costsize.c (r1.167 -> r1.168)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/costsize.c.diff?r1=1.167&r2=1.168)

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