> CHAR(n) CHARACTER SET OCTETS, where n = 8 * the number of tables involved
> in the set.
>
> Not true that you can't pass it around stored procedures. It will remain
> stable for the duration of your transaction, *inside your
> transaction*. Just don't use it to update the rdb$db_key of any
> other table!
>
> /hb

8 * the number of tables? not fields?

Anyway - what would you use it for?
Alan