Re: Passing NULL to a function called with OidFunctionCall3

On 11/10/2011 04:43 PM, Tom Lane wrote:
> Bborie Park<bkpark@ucdavis.edu>  writes:
>> I'm trying to make use of OidFunctionCall3 and am wondering how to
>> resolve an issue.  I need to be able to pass to the function called with
>> OidFunctionCall3 a NULL and am having difficulty figuring out how.
>
> You can't.  Those convenience functions are not designed to support null
> arguments (nor null results, for that matter).  If they did, they'd be
> so much more complicated to use as to not be worth the bother.
>
> You'll need to write out something comparable to what OidFunctionCall3
> does internally; look into fmgr.c.  It would behoove you also to make
> sure that the function is not strict before you call it with a null,
> because a function that is strict is entirely entitled to dump core
> on you if you do that.
>
>             regards, tom lane
>

Thanks Tom!

--
Bborie Park
Programmer
Center for Vectorborne Diseases
UC Davis
530-752-8380
bkpark@ucdavis.edu