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pgsql: Recent changes to allow hash join to exit early given empty input

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Recent changes to allow hash join to exit early given empty input
Date: 2005-11-28 17:14:48
Message-ID: 20051128171448.17F3F9DCC15@postgresql.org (view raw or flat)
Thread:
Lists: pgsql-committers
Log Message:
-----------
Recent changes to allow hash join to exit early given empty input from
one child or the other had a problem: they did not leave the node in a
state that ExecReScanHashJoin would understand.  In particular it would
tend to fail to reset the child plans when needed.  Per report from
Mario Weilguni.

Tags:
----
REL8_1_STABLE

Modified Files:
--------------
    pgsql/src/backend/executor:
        nodeHashjoin.c (r1.75.2.1 -> r1.75.2.2)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/nodeHashjoin.c.diff?r1=1.75.2.1&r2=1.75.2.2)

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Subject: pgsql: Install a more future-proof fix for the snapshot-unset bug just
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Subject: pgsql: Recent changes to allow hash join to exit early given empty input

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