From: Tom Lane <tgl@sss.pgh.pa.us>
To: Richard Huxton <dev@archonet.com>
Cc: Emil Rachovsky <zsevgymko@yahoo.com>
Cc: pgsql-general@postgresql.org <pgsql-general@postgresql.org>
Cc: pgsql-sql@postgresql.org <pgsql-sql@postgresql.org>
Subject: Re: problem with overloading the "coalesce" function
Date: Mon, 06 Mar 2006 21:39:18 -0500
Message-ID: <12236.1141699158@sss.pgh.pa.us> (raw)
In-Reply-To: <440C1D34.6060308@archonet.com>
References: <20060306111333.83983.qmail@web54306.mail.yahoo.com>
<440C1D34.6060308@archonet.com>
Richard Huxton <dev@archonet.com> writes:
> Hmm - looking at the source (and \df in psql) it seems the basic problem
> is that COALESCE() isn't a function.
If it were an ordinary function, it couldn't satisfy the property of not
evaluating "unused" arguments ...
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, dev@archonet.com, zsevgymko@yahoo.com, pgsql-general@postgresql.org
Subject: Re: problem with overloading the "coalesce" function
In-Reply-To: <12236.1141699158@sss.pgh.pa.us>
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