function getQueryExecutor() {
		if (!$this->exec) {
			$this->exec = new QueryExecutor($this->conn);
		}
		return $this->exec;
	}
function getQueryExecutor() {
		if (!$this->exec) {
			$this->exec = new QueryExecutor($this->conn);
		}
		return $this->exec;
	}
function getQueryExecutor ( ) { if ( ! $ this -> exec ) { $ this -> exec = new QueryExecutor ( $ this -> conn ) ; } return $ this -> exec ; }
Get the query executor
@return \pq\Query\ExecutorInterface
Get the query executor