Helen Borrie wrote:

>Well, as far as I can tell, it is *not* possible to fool the engine that
>your parameter could be something it knows about.
>

You mean this is a Firebird feature? That's not well :-/

>I'm curious about what you think would be returned by your statement,
>actually. To me, it looks like a statement which (if passed a valid
>argument) will return either an empty set or all of the rows in the table,
>regardless of what your UDF actually does:
>
>
>

No, you're wrong :) The function is called for each row. I'ts purpose is
to do regexp matching, it returns 0 when first argument matches
expression in second argument.

R.