RE: [SQL] Returning multiple rows in functions

From: Kief Morris <k(dot)morris(at)bitbull(dot)com>
To: "'Peter Eisentraut'" <peter_e(at)gmx(dot)net>
Cc: "'pgsql-sql(at)postgresql(dot)org'" <pgsql-sql(at)postgresql(dot)org>
Subject: RE: [SQL] Returning multiple rows in functions
Date: 2000-03-06 17:16:51
Message-ID: 30C64922AF42D311A96D00A0C91D0B107EB551@mailpost.syzygy.net
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> > ... but it only returns the first matching row. Is there
> > a way to return all the matching rows?
>
> No. Perhaps making a view would fit your application.

Looking over the docs for views, it doesn't seem like it
will work - I would need to create a new view for each
request, since the WHERE clause of the query changes
depending on the user.

My query is actually a bit more complex than the example
I provided, I'm trying to do the following:

SELECT id FROM mytable WHERE
( value_id = 1 AND value < $1 + 1 AND value > $1 - 1 ) OR
( value_id = 2 AND value < $6 + 1 AND value > $6 - 1 ) OR
( value_id = 3 AND value < $7 + 1 AND value > $7 - 1 );

... and actually, I need to have about 10 of those clauses
in the WHERE clause of the statement. This is insanely
inefficient, there's got to be a smarter way to do this.

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