Re: User defined data type

Tom Lane wrote:
> Martijn van Oosterhout <kleptog(at)svana(dot)org> 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.

Yes, STRICT IMMUTABLE, in my case, so not a problem.

> 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.

Thanks!
--don