From: FavoYang@gmail.com
To: pgsql-sql@postgresql.org
Subject: slow 'IN' clause
Date: 9 Apr 2006 20:44:34 -0700
Message-ID: <1144640674.181974.108190@u72g2000cwu.googlegroups.com> (raw)
I have a slow sql:
SELECT * FROM mytable WHERE id IN (1,3,5,7,....3k here...);
mytable is about 10k rows.
if don't use the "IN" clause, it will cost 0,11 second, otherwise it
will cost 2.x second
I guess pg use linear search to deal with IN clause, is there any way
to let pg use other search method with IN clause? (ex.Binary Search or
hash Search)
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To: pgsql-sql@postgresql.org
Cc: FavoYang@gmail.com
Subject: Re: slow 'IN' clause
In-Reply-To: <1144640674.181974.108190@u72g2000cwu.googlegroups.com>
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