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<snip>
where coalesce will convert a null date into some default value. Yes,
you
could do that in the udf, but leaving it outside of the udf will allow a
programmer who might prefer to receive a null value to indicate an
invalid
date to do so. That way they don't have to worry if they actually have
a
transaction on 01/01/01 or some such thing.
</snip>
iDate returns a null for an invalid date so:
Select Coalesce(iDate(file.field), :myDefaultValue) into :pgmfield from
file
works fine.
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