Martijn van Oosterhout <kleptog@xxxxxxxxx> writes: > On Thu, Mar 30, 2006 at 11:51:41AM -0700, Don Y wrote: >> - Can *_in() be ever invoked with a NULL argument? Or, can I >> safely assume that the pointer I am passed is valid? > You can't get a NULL there. Yes, the pointer is valid cstring. To be sure about that, make sure you mark the function STRICT when you define it. Otherwise you can get burnt by direct user invocation select int4in(null::cstring); not to mention that we were recently considering letting non-strict input functions get invoked on nulls in the normal course of events. regards, tom lane
