Simon Riggs <simon(at)2ndQuadrant(dot)com> writes:
> STRICT functions return NULL if any of their inputs are NULL according
> to the manual, so that they need not be executed at all.
> Unless it is a Set Returning Function, in which case a NULL input is
> not reduced nor does it to appear to be handled as a special case in
> the executor function scan code.
> So a function that is both STRICT and SET RETURNING will return rows.
Really? The case behaves as expected for me.
regards, tom lane