To: craig perras <craigp98072@yahoo.com>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: cleaning up in UDF's (user-defined functions) 
In-reply-to: <20040609022908.43286.qmail@web21208.mail.yahoo.com> 
References: <20040609022908.43286.qmail@web21208.mail.yahoo.com>
Comments: In-reply-to craig perras <craigp98072@yahoo.com>
	message dated "Tue, 08 Jun 2004 19:29:08 -0700"
Date: Wed, 09 Jun 2004 10:53:41 -0400
Message-ID: <21081.1086792821@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>

craig perras <craigp98072@yahoo.com> writes:
> I appended an excerpt from the docs... IIUC, if I make
> a DSQL call from a UDF (written in C), and there's a
> transaction abort caused by that command, then my
> function is never called back. How do I cleanup any
> resources the function allocated if this is the case?

What resources?  Most stuff (like palloc'd memory) is taken care of
for you.  If you're maintaining your own private permanent data
structures then you may need to plug in a transaction-end hook
routine to clean those up.

pgsql-interfaces is hardly the place for discussing how to write
C-language server functions; if you want to discuss the fine points
I'd suggest pgsql-hackers.

			regards, tom lane