Alessandro,

I ran a similar query through IB_SQL:

SELECT FIRST 1 SKIP 0 * FROM RDB$DATABASE

This prepares OK, but upon executing it I get "Invalid parameter to
FIRST/LIMIT. Only positive values allowed."

Though I must admit this was against FB 1.0.0.338 Beta 2 (probably ancient
by now), which undoubtedly contained an error since SKIP 1 didn't skip
anything.

Anyway, your original question has nothing to do with IBO, and maybe you
would get more replies if you asked the appropriate newsgroup (ib-support)
and stated your Firebird version.

Set