On Wed, Feb 22, 2012 at 05:30:02PM +0100, Matthias Leopold wrote:
> hi,
> 
> i want to use postgres (8.3) plperl functions to provide
> virtual_mailbox_domains/relay_domains.
> 
> is this possible?
> 
> how do i make a postgres plperl function return a value/row only
> when certain conditions are met and otherwise return
> "nothing"/void/0 rows? right now my function returns "1 row" even
> when i return undef.
> 
> i know this is more of a postgres question, but i couldn't find an
> answer in postgres docs/lists yet. maybe someone here can help me
> out ;-)
> 
> thx
> matthias
> 

The documentation for plperl states:

...to return an SQL null value from a PL/Perl function,
return an undefined value...

Did you try that?

Cheers,
Ken

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