CONTAINING has been there for a long time, so yes, it did exist in
IB6. It does not use an index (how could it when it doesn't know where
to start looking?). If you want to use an index, you can use STARTING
[WITH].

Set

> Thanks Daniel. I didn't even know there is such as containing in
> firebird. Is this available only in FB 1.5 or it is already exist
> since IB 6? Does this uses the index?