Package constant in select statement

Question

In my Package has several consatnt values...
CREATE OR REPLACE PACKAGE xoec IS
EXPIRED_DESC CONSTANT VARCHAR2(20) := 'Expired';
LIVE CONSTANT VARCHAR2(1) := 'L';
LIVE_DESC CONSTANT VARCHAR2(20) := 'Live';
CANCELLED CONSTANT VARCHAR2(1) := 'X';
CANCELLED_DESC CONSTANT VARCHAR2(20) := 'Cancelled';
END ;
I want to display the constant in Select statement.
select xoec.live from dual;
The above statement through error.
Please help to fix it.
Regards
Mani

Answer 1

This is one of examples.
CREATE OR REPLACE PACKAGE xoec IS
  EXPIRED_DESC CONSTANT VARCHAR2(20) := 'Expired';
  LIVE CONSTANT VARCHAR2(1) := 'L';
  LIVE_DESC CONSTANT VARCHAR2(20) := 'Live';
  CANCELLED CONSTANT VARCHAR2(1) := 'X';
  CANCELLED_DESC CONSTANT VARCHAR2(20) := 'Cancelled';
  function get(in_vc varchar2) return varchar2;
END ;
CREATE OR REPLACE
PACKAGE BODY xoec IS
  function get(in_vc varchar2) return varchar2
  is
  begin
    if    upper(in_vc) = 'EXPIRED_DESC' then
       return EXPIRED_DESC;      
    elsif upper(in_vc) = 'LIVE' then
       return LIVE;
    elsif upper(in_vc) = 'LIVE_DESC' then
       return LIVE_DESC;
    elsif upper(in_vc) = 'CANCELLED' then
       return CANCELLED;
    elsif upper(in_vc) = 'CANCELLED_DESC' then
       return CANCELLED_DESC;
    else
       null; -- somthing error raising
    end if;
  end;
END;
SQL> select xoec.get('live') from dual;
XOEC.GET('LIVE')
L