I'm trying use INVL (from IBUDF) in an expression like:

SELECT INVL( MIN(INT_A), 0)
FROM A;

But I'm getting always 0, even if the SQL below doesn't return a null value:
SELECT MIN(INT_A)
FROM A;

When I use INVL( MIN(INT_A), 3), for example, I'm getting the correct
result: MIN(INT_A), if it's null.

Is this a bug?

Thanks in advance.
---------------------------
Martin D. Berezaga
mdberezaga@...
ICQ : 18537142
Porto Alegre - RS - Brasil
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