Christopher Kings-Lynne <chriskl@familyhealth.com.au> writes:
>> test=# select null_safe_cmp (NULL,NULL);
>> ERROR: could not determine anyarray/anyelement type because input has
>> type "unknown"
>> Same casting problem due to anyelement, of course.
> Yes - I wonder what the trick to getting around that is?
You might be able to hack it by creating a second function defined asnull_safe_cmp(unknown,unknown)
Pretty grotty of course, and I'm not sure that it comes up in the
real world as opposed to test cases.
regards, tom lane
