jodd-db/src/main/java/jodd/db/DbQuery.java
public Q setRef(final int index, final Ref value) {
		initPrepared();
		try {
			preparedStatement.setRef(index, value);
		} catch (SQLException sex) {
			throwSetParamError(index, sex);
		}
		return _this();
	}
public Q setRef(final int index, final Ref value) {
		initPrepared();
		try {
			preparedStatement.setRef(index, value);
		} catch (SQLException sex) {
			throwSetParamError(index, sex);
		}
		return _this();
	}
public Q setRef ( final int index , final Ref value ) { initPrepared ( ) ; try { preparedStatement . setRef ( index , value ) ; } catch ( SQLException sex ) { throwSetParamError ( index , sex ) ; } return _this ( ) ; }
---------------------------------------------------------------- Ref
---------------------------------------------------------------- Ref