Transaction control in SECURITY DEFINER procedures

[Chris Sterritt]

The documentation for CREATE PROCEDURE informs us "A|SECURITY 
DEFINER|procedure cannot execute transaction control statements (for 
example,|COMMIT|and|ROLLBACK|, depending on the language)."

Can anyone let me know why this is so and are there any plans to remove 
this restriction in future releases?

Regards, Chris Sterritt