Skip site navigation (1) Skip section navigation (2)

pgsql: Fix cost_nestloop and cost_hashjoin to model the behavior of semi

From: tgl(at)postgresql(dot)org (Tom Lane)
To: pgsql-committers(at)postgresql(dot)org
Subject: pgsql: Fix cost_nestloop and cost_hashjoin to model the behavior of semi
Date: 2009-05-09 22:51:41
Message-ID: 20090509225141.EC31F754067@cvs.postgresql.org (view raw or flat)
Thread:
Lists: pgsql-committers
Log Message:
-----------
Fix cost_nestloop and cost_hashjoin to model the behavior of semi and anti
joins a bit better, ie, understand the differing cost functions for matched
and unmatched outer tuples.  There is more that could be done in cost_hashjoin
but this already helps a great deal.  Per discussions with Robert Haas.

Modified Files:
--------------
    pgsql/src/backend/optimizer/path:
        costsize.c (r1.207 -> r1.208)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/path/costsize.c?r1=1.207&r2=1.208)
    pgsql/src/backend/optimizer/plan:
        createplan.c (r1.258 -> r1.259)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/plan/createplan.c?r1=1.258&r2=1.259)
    pgsql/src/backend/optimizer/util:
        restrictinfo.c (r1.58 -> r1.59)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/backend/optimizer/util/restrictinfo.c?r1=1.58&r2=1.59)
    pgsql/src/include/optimizer:
        restrictinfo.h (r1.43 -> r1.44)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/optimizer/restrictinfo.h?r1=1.43&r2=1.44)

pgsql-committers by date

Next:From: User H-saitoDate: 2009-05-10 01:23:25
Subject: pg-migrator - pg_migrator: adjustment of a function on win32.
Previous:From: User BmomjianDate: 2009-05-09 21:18:03
Subject: pg-migrator - pg_migrator: Use LANG=C so the output of pg_resetxlog -n

Privacy Policy | About PostgreSQL
Copyright © 1996-2014 The PostgreSQL Global Development Group