Hi,
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()? I note the
cast of int4's to int2's signal similar errors -- *but*
returns "(int2) value".
Is the return value just *ignored* when the error is
signaled?
Thanks!
--don
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