DBMS_Session.List_Context() for GLOBALLY ACCESSED Context

Question

I created
CREATE CONTEXT myContext USING PACKAGE myPackage ACCESSED GLOBALLY ;
CREATE OR REPLACE PACKAGE myPackage
PROCEDURE Set_My_Context(
piId IN INTEGER,
piValue IN INTEGER) ;
END myPackage ;
CREATE OR REPLACE PACKAGE BODY myPackage
PROCEDURE Set_My_Context(
piId IN INTEGER,
piValue IN INTEGER)
IS
BEGIN
DBMS_Session.Set_Context(
'myContext',
'myValue',
piValue,
SYS_Context('USERENV', 'SESSION_USER'),
piId) ;
END Set_My_Context ;
END My_Package ;
Test Script
DECLARE
iSize INTEGER ;
tblAppCtx DBMS_Session.AppCtxTabTyp ;
BEGIN
DBMS_Session.Set_Identifier(piId) ;
My_Package.Set_My_Context(
1,
9999) ;
DBMS_Session.List_Context(
tblAppCtx
iSize) ;
DBMS_Output.Put_Line('iSize = ' || iSize) ;
DBMS_Output.Put_Line('SYS_Context(''myContext', ''myValue'') = '
|| SYS_Context('myContext', 'myValue') ) ;
END ;
Output
iSize = 0
SYS_Context('myContext', 'myValue') = 9999
Questions
1) Why isn't the global application variable included in List_Context()? It obviously exists based on the value returned by SYS_Context().
2) Is it because the context is accessed globally and the variable is stored in the SGA not the UGA?
(My theory because List_Context() works as accepted if CREATE CONTEXT myContext USING PACKAGE myPackage does not include ACCESSED GLOBALLY. However I can find do such an exclusion within Oracles documentation for DBMS_Session or CREATE CONTEXT.
Any insight would be appreciated.
Jenean Spencer

Answer 1

1) Why isn't the global application variable included in List_Context()?because list_context just includes contexts which are session specific. Global Contexts are not session specific ...
If you want to get hold of the global contexts then use the view global_context:
SQL> select * from v$version where rownum = 1
BANNER                                                                         
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - Production         
1 row selected.
SQL> create context mycontext using mypackage accessed globally
Context created.
SQL> create or replace package mypackage
as
  procedure set_my_context (piid in integer, pivalue in integer);
end mypackage;
Package created.
SQL> create or replace package body mypackage
as
  procedure set_my_context (piid in integer, pivalue in integer)
  is
  begin
    dbms_session.set_context ('myContext', 'myValue', pivalue, sys_context ('USERENV', 'SESSION_USER'), piid);
  end set_my_context;
end mypackage;
Package body created.
SQL> declare
  isize       integer;
  tblappctx   dbms_session.appctxtabtyp;
begin
  dbms_session.set_identifier (1);
  mypackage.set_my_context (1, 9999);
  for c in (select * from global_context)
  loop
    dbms_output.put_line (c.namespace || ': ' || c.attribute || ' - ' || c.value);
  end loop;
end;
MYCONTEXT: MYVALUE - 9999
PL/SQL procedure successfully completed.