On Jan 8, 2007, at 06:45, Paul Vinkenoog wrote:

> Declarations for the "null-enhanced" functions are in ib_udf2.sql. If
> you keep using the existing declarations (in ib_udf.sql), you get the
> old behaviour, where Nulls are passed as empty strings.

Only some of them have been enhanced. Reading from the top of the
file, I see
abs and acos have not been changed, but ascii_char has.
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