Clear Range and Add Range in ExecuteQuery in Ax 2012.

public void executeQuery()
{
    DimensionMappingTable_DS.query().dataSourceTable(tableNum(DimensionMappingTable)).clearRanges();
    if(TransType.selection() >= 0)
    {
               DimensionMappingTable_DS.query().dataSourceTable(tableNum(DimensionMappingTable))
            .addRange(fieldNum(DimensionMappingTable,Dimensions))
            .value(SysQuery::value(TransType.selection()));
    }

    super();
}