From: "Tamas Varga" <uak6wv@...>

> How can I determine the size of a key knowing the size (in byte) of
> the included fields? (Or where can I find the appropriate parts in the
> source code?)
> Mainly I want to create unique keys using one as long as possible
> varchar field and some UUID field (char(22)). In some cases I have to
> use additional integer fields.

Use "Index key size calculator" that can be found here
http://www.volny.cz/iprenosil/interbase/

Ivan