title: Variables in a Context variable
body: <p>I have a table and I would like to use a context variable to select from that table.</p>
  
  <p>Table
  Key, data
  'XX', 'BLAbla'
  'yy', 'blaBla'
  'zz', 'bLaBla'
  'aa', 'lkdjfa'
  .....
  ....
  ..</p>
  
  <p>My selection is : </p>
  
  <p>select * from Table where key is not in ('XX','zz');</p>
  
  <p>My definition of the context variable is like </p>
  
  <p>Variable := '('||'''xx'''||','||'''yy'''||')';</p>
  
  <p>DBMS__SESSION.SET_CONTEXT('key_context', 'KeyValues', Variable );</p>
  
  <p>Select sys_context('key_context','KeyValues') Result from dual;</p>
  
  <p>Result
  ('XX','zz') </p>
  
  <p>So I thouhgt this would work:</p>
  
  <p>select * from Table where key is not in sys_context('key_context','KeyValues');</p>
  
  <p>Any suggestions?</p>