title: Trying to control ISQL/Perform DISPLAYONLY field tags when aborting actions?
body: <p>ISQL 7.3 Perform:</p>
  
  <p>In my Perform screen I have:</p>
  
  <pre><code>dsptag1 = DISPLAYONLY TYPE SMALLINT;
  dsptag2 = DISPLAYONLY TYPE DECIMAL;
  lastpdate = transaction.last_pymt_date; [DATE]
  inttab1   = interest.int_rate1; [DEC(5,2) {from lookup table}]
  
  AFTER QUERY DISPLAY OF transaction
  LET dsptag1 = TODAY - lastpdate
  LET dsptag2 = inttab1 * dsptag1
  [...]
  </code></pre>
  
  <p>After I have located the desired row, I proceed to (U)pdate it with an interest pymt by entering the number of months customer is going to pay, but decide to abort (CTRL-C) the action.  Unfortunately,  the <code>dsptag1</code> and <code>dsptag2</code> values weren't restored to what AFTER QUERY DISPLAY told it to display, as well as other displayonly tags.  However table-cols properly revert to their pre-update values!  </p>