code: public void disableJdbcLogging(WSRdbManagedConnectionImpl mc) throws ResourceException {
          mc.mcf.reallySetLogWriter(null);
          mc.mcf.loggingEnabled = false;
      }
docs: This method is used to disable jdbc logging. The boundaries by which the method may be called: <br>
  <li> before we hand out a connection in mc.getConnection </li>
  <li> during cleanup of the connection </li>
  The way jdbc logging is disabled will vary from one backend to another; some will be
  on the connection, some will be on the system as a whole, and others will be on the datasource.
  
  
  @param mc WSRdbManagedConnectionImpl
  @exception ResourceException