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From: Andrew Chernow <ac@esilo.com>
To: Tom Lane <tgl@sss.pgh.pa.us>
Cc: Merlin Moncure <mmoncure@gmail.com>
Cc: Andrew Dunstan <andrew@dunslane.net>
Cc: Alvaro Herrera <alvherre@commandprompt.com>
Cc: Patches (PostgreSQL) <pgsql-patches@postgresql.org>
Subject: Re: libpq object hooks
Date: Fri, 16 May 2008 22:34:35 -0400
Message-ID: <482E443B.8080903@esilo.com> (raw)
In-Reply-To: <18090.1210990759@sss.pgh.pa.us>
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	<482C82BA.3090100@esilo.com>
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	<18090.1210990759@sss.pgh.pa.us>

Tom Lane wrote:
>  ISTM the hook
> ought to be able to request that libpq return an out-of-memory failure
> for the query, just as would happen if the malloc failure had happened
> directly to libpq.
> 
> 

I am working on this new patch and that is how I have been implementing it.  If 
the eventProc function returns FALSE for creation events (not destruction 
events), the libpq call that triggered it will fail.  For instance: for the 
creation of result objects "PGEVT_RESULTCREATE", I am clearing the result and 
returning an error value.

I think that is the expected behavior when one calls PQexec and an out-of-memory 
failure occurs.

-- 
Andrew Chernow
eSilo, LLC
every bit counts
http://www.esilo.com/



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