From: Michael Fuhr <mike@fuhr.org>
To: Jerry Day <jerry_day@esri.com>
Cc: 'pgsql-interfaces@postgresql.org' <pgsql-interfaces@postgresql.org>
Subject: Re: Problems with PQfmod() returning -1 on varchar field (libpq-8.0.0 )?
Date: Sat, 2 Apr 2005 18:56:13 -0700
Message-ID: <20050403015613.GA29651@winnie.fuhr.org> (raw)
In-Reply-To: <491DC5F3D279CD4EB4B157DDD62237F406ABE858@zipwire.esri.com>
References: <491DC5F3D279CD4EB4B157DDD62237F406ABE858@zipwire.esri.com>
On Fri, Apr 01, 2005 at 04:21:03PM -0800, Jerry Day wrote:
>
> I've recently encountered a situation where PQfmod() fails to return the
> defined length of a varchar field referenced in a query, as expected -
> returning no information (-1), instead. Has anyone else encountered this
> issue? If so, why does this occur? Can you recommended a method to more
> reliably obtain the length of varchar fields, as defined in the relations
> referenced by a query?
Are you sure the column has a length specifier? What does "\d tablename"
show, or what's the result of the following query?
SELECT attname, attnum, atttypid::regtype, atttypmod
FROM pg_attribute
WHERE attrelid = 'tablename'::regclass
AND attnum >= 1
AND attisdropped IS FALSE
ORDER by attnum;
--
Michael Fuhr
http://www.fuhr.org/~mfuhr/
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To: pgsql-interfaces@postgresql.org
Cc: mike@fuhr.org, jerry_day@esri.com
Subject: Re: Problems with PQfmod() returning -1 on varchar field (libpq-8.0.0 )?
In-Reply-To: <20050403015613.GA29651@winnie.fuhr.org>
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