From: Filip Rembiałkowski <plk.zuber@gmail.com>
To: Ivan Sergio Borgonovo <mail@webthatworks.it>
Cc: pgsql-sql@postgresql.org
Subject: Re: short-cutting if sum()>constant
Date: Tue, 22 Dec 2009 14:48:55 +0100
Message-ID: <92869e660912220548j43a4528fu28b1389477e9fb1c@mail.gmail.com> (raw)
In-Reply-To: <20091222133527.3007bd96@dawn.webthatworks.it>
References: <20091222133527.3007bd96@dawn.webthatworks.it>
2009/12/22 Ivan Sergio Borgonovo <mail@webthatworks.it>
> Hi,
>
Hi :-)
>
> I'd like to know if
>
> select sum(qty) from t where status=37;
>
> is > constant.
>
> qty is always >0.
>
> Is there a way to skip examining further rows and return a result
> ASAP?
>
With plain SQL, no.
With a user defined function in PL/PgSQL, yes.
>
>
> --
> Ivan Sergio Borgonovo
> http://www.webthatworks.it
>
>
> --
> Sent via pgsql-sql mailing list (pgsql-sql@postgresql.org)
> To make changes to your subscription:
> http://www.postgresql.org/mailpref/pgsql-sql
>
--
Filip Rembiałkowski
JID,mailto:filip.rembialkowski@gmail.com
http://filip.rembialkowski.net/
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To: pgsql-sql@postgresql.org
Cc: plk.zuber@gmail.com, mail@webthatworks.it
Subject: Re: short-cutting if sum()>constant
In-Reply-To: <92869e660912220548j43a4528fu28b1389477e9fb1c@mail.gmail.com>
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