ok, this is section from Application development guide on authorities
on Stored procedure is what I don't understand:

- By virtue of a successful CREATE statement, definer has EXECUTE WITH
GRANT
privilege on the routine.

At other place, it mentions:

- The routine package owner must GRANT EXECUTE on the package to the
routine definer. This can be done before or after the routine is
registered, but it must be done before the routine is invoked.

These seem to be mutually conflicting statements. Definer has execute
not 'by virtue' of a CREATE statement, but because GRANT EXECUTE has
been given to it (definer) by the package owner.

TIA
Raquel.

Raquel,

The reason for this is that a package is not intrinsically hooked to a
routine.
A Package belongs to the source code, which is exactly one file.
The CREATE PROCEDURE/CREATE FUNCTION statement for external alanguages
at best knows about the entry point to the body. It has no control over
the call chain of the host language and hence which other files may be
involved. This is why packages have orthogonal security.

Cheers
Serge
--
Serge Rielau
DB2 SQL Compiler Development
IBM Toronto Lab