From: Benno Pütz <puetz@mpipsykl.mpg.de>
To: pgsql-interfaces@postgresql.org
Subject: How to detect NULL in VarChar (C function)
Date: Thu, 13 Jan 2005 17:53:40 +0100
Message-ID: <41E6A794.6020701@mpipsykl.mpg.de> (raw)
I try to write a function that combines two varchar columns.
Now the problem arose that (either) one of te columns may contain a NULL
value, in which case the return value seems to become NULL.
I have not been able to find a description of how to detect NULL values
in VarChar variables passed to C-functions to catch those cases.
Any help will be appreciated
Benno
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To: pgsql-interfaces@postgresql.org
Cc: puetz@mpipsykl.mpg.de
Subject: Re: How to detect NULL in VarChar (C function)
In-Reply-To: <41E6A794.6020701@mpipsykl.mpg.de>
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