/**
  * Find object by primary key using raw SQL to go fast.
  * Bypass doSelect() and the object formatter by using generated code.
  *
  * @param     mixed $key Primary key to use for the query
  * @param     ConnectionInterface $con A connection object
  *
  * @return ChildExpertGroupMembers A model object, or null if the key is not found
  */
 protected function findPkSimple($key, ConnectionInterface $con)
 {
     $sql = 'SELECT EXPERT, GROUP_NAME FROM expert_group_members WHERE EXPERT = :p0 AND GROUP_NAME = :p1';
     try {
         $stmt = $con->prepare($sql);
         $stmt->bindValue(':p0', $key[0], PDO::PARAM_STR);
         $stmt->bindValue(':p1', $key[1], PDO::PARAM_STR);
         $stmt->execute();
     } catch (Exception $e) {
         Propel::log($e->getMessage(), Propel::LOG_ERR);
         throw new PropelException(sprintf('Unable to execute SELECT statement [%s]', $sql), 0, $e);
     }
     $obj = null;
     if ($row = $stmt->fetch(\PDO::FETCH_NUM)) {
         /** @var ChildExpertGroupMembers $obj */
         $obj = new ChildExpertGroupMembers();
         $obj->hydrate($row);
         ExpertGroupMembersTableMap::addInstanceToPool($obj, serialize(array((string) $key[0], (string) $key[1])));
     }
     $stmt->closeCursor();
     return $obj;
 }