From: adrian@wsi.edu.pl
To: pgsql-sql@postgresql.org
Subject: hints or suggestion for optimizer
Date: Thu, 18 Jul 2002 12:34:27 +0200
Message-ID: <ah653f$130v$1@news.hub.org> (raw)
How can I optimize Postrges SQL when I would like have ordering kolumns
without clause ORDER BY - in Oracle you can use hints to suggestion
optimizer.
for example.
SELECT /*+ INDEX_ASC TAB(TAB_PK) +/ * FROM TAB <WHERE CLAUSE> - most
efficent
SELECT * FROM TAB ORDER BY TAB_PK <WHERE CLAUSE>
where TAB_PK - is unique index on KOD column
WHERE CLAUSE - without OR ,UNION, accept LIKE, AND etc
Does similar mechanizm has Postgres ?
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To: pgsql-sql@postgresql.org
Cc: adrian@wsi.edu.pl
Subject: Re: hints or suggestion for optimizer
In-Reply-To: <ah653f$130v$1@news.hub.org>
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