I just found this thread: http://archives.postgresql.org/pgsql-general/2011-11/msg00424.php
So I'll use the same workaround. Nothing to see here, folks, move along.... d On Fri, Nov 18, 2011 at 11:17 AM, David Zwarg <dzwarg+post...@azavea.com>wrote: > Hello, > > I have been working with the PostGIS developers, and I'm implementing a > facility to use 'callback' functions to process cells in a raster image. > > I have implemented this behind the scenes as a C function that calls a > provided sql regprocedure with OidFunctionCall*. I have been reading the > docs, and it states that "Note that neither arguments nor result are > allowed to be NULL." > > In this use case, there are legitimate reasons to return NULL from a > 'callback' function -- is there an alternative method that I should use, > instead of OidFunctionCall*? > > Thanks, > David >
