To: Edward Amsden <amsden_linux@embarqmail.com>
cc: pgsql-interfaces@postgresql.org
Subject: Re: pqlib large object error 
In-reply-to: <1213118594.9123.11.camel@dad-desktop2> 
References: <1213118594.9123.11.camel@dad-desktop2>
Comments: In-reply-to Edward Amsden <amsden_linux@embarqmail.com>
	message dated "Tue, 10 Jun 2008 13:23:14 -0400"
Date: Tue, 10 Jun 2008 17:06:23 -0400
Message-ID: <24672.1213131983@sss.pgh.pa.us>
From: Tom Lane <tgl@sss.pgh.pa.us>

Edward Amsden <amsden_linux@embarqmail.com> writes:
> I am using the following code to create the large object:
> 		lo_1 =  lo_creat(connect1, INV_READ|INV_WRITE);
> 		if (lo_1 > 0) {
> 			... (open and write)
> 		} else {
> 			fprintf (stderr, "Unable to create large object: %s\n", PQerrorMessage(connect1));
> 		}

BTW, what type do you have lo_1 declared as?  It strikes me that if it's
signed int32, and your OID counter is past 2 billion, this code would
fail because it would misinterpret a valid OID as negative.  The printf
would then report whatever the last error on the connection had been.
This still wouldn't explain why you're getting the duplicate-key error,
but it might at least point to the proper place to look.

			regards, tom lane