From: Tom Lane <tgl@sss.pgh.pa.us>
To: Gerardo Herzig <gherzig@fmed.uba.ar>
Cc: postgres list <pgsql-sql@postgresql.org>
Subject: Re: its posible to use a 2 column returning function as a subquery?
Date: Fri, 11 Sep 2009 17:44:54 -0400
Message-ID: <11732.1252705494@sss.pgh.pa.us> (raw)
In-Reply-To: <4AAAB01E.8070009@fmed.uba.ar>
References: <4AAAB01E.8070009@fmed.uba.ar>
Gerardo Herzig <gherzig@fmed.uba.ar> writes:
> There is some syntax for calling get_desc_and_price only once?
Do something like
select (t).* from (select get_desc_and_price(shoe) as t from ...) ss;
If you don't have get_desc_and_price marked as volatile, you'll probably
also need to add "offset 0" to the sub-select to keep the planner from
flattening the sub-select and producing multiple calls of the function.
regards, tom lane
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To: pgsql-sql@postgresql.org
Cc: tgl@sss.pgh.pa.us, gherzig@fmed.uba.ar
Subject: Re: its posible to use a 2 column returning function as a subquery?
In-Reply-To: <11732.1252705494@sss.pgh.pa.us>
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