test=# select null_safe_cmp (NULL,NULL);ERROR: could not determine anyarray/anyelement type because input has type "unknown"test=# select null_safe_cmp (NULL::integer,NULL::integer); null_safe_cmp --------------- 1 (1 row)Same casting problem due to anyelement, of course.
Yes - I wonder what the trick to getting around that is?
Chris
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