> > UPDATE RDB$PROCEDURES SET RDB$PROCEDURE_SOURCE = NULL
> >
>
> Can i reverser it at any moment?

No. Of course not. Once deleted, you cannot get the source back.

With regards,

Martijn Tonies
Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL
Server.
Upscene Productions
http://www.upscene.com