From: Rodrigo De León <rdeleonp@gmail.com>
To: pgsql-sql@postgresql.org, "Trigve Siver" <trigves@yahoo.com>
Subject: Re: slow query execution
Date: Wed, 30 May 2007 12:28:47 -0500
Message-ID: <a55915760705301028r69887f67q2efcb814550b80c5@mail.gmail.com> (raw)
In-Reply-To: <710412.41081.qm@web52709.mail.re2.yahoo.com>
References: <710412.41081.qm@web52709.mail.re2.yahoo.com>
On 5/30/07, Trigve Siver <trigves@yahoo.com> wrote:
> Can you point me to some sources
> or give me some examples, please?
CREATE OR REPLACE FUNCTION ROWNUM() RETURNS BIGINT AS
$$
BEGIN
RETURN NEXTVAL('ROWNUM_SEQ');
EXCEPTION WHEN OTHERS THEN
CREATE TEMP SEQUENCE ROWNUM_SEQ;
RETURN NEXTVAL('ROWNUM_SEQ');
END;
$$
LANGUAGE 'PLPGSQL';
SELECT ROWNUM(), S.X
FROM GENERATE_SERIES(5,1,-1) S(X);
Remember to reset the sequence value if you use this more than once in
the same session.
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To: pgsql-sql@postgresql.org
Cc: rdeleonp@gmail.com, trigves@yahoo.com
Subject: Re: slow query execution
In-Reply-To: <a55915760705301028r69887f67q2efcb814550b80c5@mail.gmail.com>
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