Date: Mon, 18 Jul 2005 18:01:14 +0100
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: Parse a statement, get parameter types and return types
Message-ID: <20050718170113.GA3411@furbychan.cocan.org>
References: <20050718130337.GA23201@furbychan.cocan.org>
	<2839.1121695124@sss.pgh.pa.us>
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From: Richard Jones <rich@annexia.org>

On Mon, Jul 18, 2005 at 09:58:44AM -0400, Tom Lane wrote:
> This is possible at the protocol level -- see Describe Statement.
> I'm not sure which client libraries let you get at the results ...
> libpq isn't one of them :-(

Thanks for answering my question so promptly!

I've made a small patch against 8.0.3 which adds this functionality to
libpq-fe.  However I am not very certain of how the asynchronous stuff
works in this library, so it will need careful checking.
Nevertheless, it Works For Me in the limited testing I have done
against a 7.4 server.

http://annexia.org/tmp/PQsendDescribeStatement.diff

Note the user is expected to free(3) the Oids (types) array returned
by PQgetDescription.

Rich.

-- 
Richard Jones, CTO Merjis Ltd.
Merjis - web marketing and technology - http://merjis.com
Team Notepad - intranets and extranets for business - http://team-notepad.com