-- | createRTuple: Create an Rtuple from a list of column names and values
createRtuple ::
      [(ColumnName, RDataType)]  -- ^ input list of (columnname,value) pairs
    -> RTuple 
createRtuple l = HM.fromList l
createRtuple ::
      [(ColumnName, RDataType)]  -- ^ input list of (columnname,value) pairs
    -> RTuple
createRtuple l = HM.fromList l
createRtuple l = HM.fromList l