-- | toListRDataType: returns a list of RDataType values of an RTuple, in the fixed column order of the RTuple
toListRDataType :: 
    RTupleMData
    -> RTuple
    -> [RDataType]
toListRDataType rtupmd rtup = Prelude.map (\cname -> rtup <!> cname) (toListColumnName rtupmd)
toListRDataType :: 
    RTupleMData
    -> RTuple
    -> [RDataType]
toListRDataType rtupmd rtup = Prelude.map (\cname -> rtup <!> cname) (toListColumnName rtupmd)
toListRDataType rtupmd rtup = Prelude.map (\cname -> rtup <!> cname) (toListColumnName rtupmd)