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authid & invoker rights

Oracle Database Tips by Donald BurlesonApril 11, 2015

Question:  I need to understand the authid and invoker rights, and how the authid current_user related to invoker rights.  What does invoker rights mean?.

Answer:  The authid current_user is used when you want a piece of code (PL/SQL) to execute with the privileges of the invoker (the current user), and NOT the user ID that created the procedure.  This is termed a "invoker rights", the opposite of "definer rights".

To understand the authid current_user, consider this type definition where the invoker gets the rights to the :

CREATE TYPE address_t
   AUTHID CURRENT_USER
AS OBJECT (
   address_line1     varchar2(80),
   street_name       varchar2(30),
   street_number     number,
   city              varchar2(30),
   state_or_province varchar2(2),
   country_code varchar2(20));

See this example of authid invoker rights to understand how the invoker rights syntax causes invoker rights, which, in turn, changes the behavior of the PL/SQL code away from the definer rights as we would find in a grant execute or definer rights.

Below is a a query that shows all procedures that have authid = 'DEFINER' (definer rights) or authid = 'CURRENT_USER' (invoker rights).

select
   object_name,
   procedure_name,
   authid
from 
   dba_procedures; 

 

 
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