I can't find a reference in the docs for this...
I have a plperl function returning an int. The int is returned as the
result of a system call.
It is set to return a null if one of the inputs is null, but I can't see
how to return a null if the result is indeterminate. The function
currently returns a 0 instead.
How do I stick an if in the function to return a null where appropriate?
Thanks,
Brent Wood
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