Message-ID: <534BEF93.40307@4js.com>
Date: Mon, 14 Apr 2014 16:24:19 +0200
From: Sebastien FLAESCH <sf@4js.com>
Organization: Four Js Development Tools
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To: pgsql-interfaces@postgresql.org
Subject: Re: Type identification with libpq / PQFmod() when using
 aggregates (SUM)
References: <534BB32F.4020503@4js.com> <12496.1397484060@sss.pgh.pa.us>
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On 04/14/2014 04:01 PM, Tom Lane wrote:
> Sebastien FLAESCH <sf@4js.com> writes:
>> But when using an aggregate function like SUM(), PQfmode() function returns
>> "no information available" (-1) ...
>
>> Is the type of the result of an aggregate function (or even more complex
>> expressions) not known by the server?
>
> That's correct.

Thank you Tom, but then, IMHO, it should be considered as a request...

Some client applications (which do a bit more than just displaying the result
string of query columns) need that information, for ex to do data conversions,
automatic formatting, etc.

Seb


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