title: Oracle forms search filter
body: <p>I have created datablock with product information. I want to search by product Id; for that I have created trigger an on search button.</p>
  
  <pre><code>declare 
      x varchar2(20);
  begin
  
      X:= 'description=' || chr(39) || :inverntory.s || chr(39) ;
  
      set_block_property('search', default_where, x);
  
      execute_query ;
  
  end;
  </code></pre>
  
  <p>when I run the form it gives me this error:</p>
  
  <pre><code>FRM 40735 when button pressed trigger raised unhanded exception ora-06502
  </code></pre>
  
  <p>what is wrong with the datatype, or...?</p>