Tom Lane wrote:
> Don Y <pgsql@DakotaCom.Net> writes:
>> I'm writing a set of casts to/from various user defined
>> types. As is unexpected, there are cases where one
>> data type doesn't neatly map to another (for certain
>> values). In these cases I emit an INVALID_PARAMETER_VALUE
>> or OUT_OF_RANGE error -- depending on the situation.
>
>> But, should I also PG_RETURN_NULL()?
>
> elog(ERROR) doesn't return to your function --- think of it as being
> like exit(). So it's pointless to code anything after it.
Ah, OK. "/* NOT REACHED */"
Thanks!
--don
