>> No, it's not implicit at all.

Sorry, thought it was clear that I meant "implicitly created."

>> Firebird can always use the leftmost column(s) of an index as though

it

>> (they) were an index in their own right.

Cool. So would it follow that if I wanted to search on COLUMN_CHILD_ID
that I *should* create an Index for that column?

>> It's explained in some detail in Chapter 18 of "The Firebird Book", a

>> black, red and yellow doorstopper coming to a bookstore near you in

about a

>> week from now.

Great, because I pre-ordered your book from Amazon.com about two weeks
ago and I'm eagerly awaiting its arrival.

R.