presto-hive/src/main/java/io/prestosql/plugin/hive/HivePageSourceProvider.java/HivePageSourceProvider/interim
class HivePageSourceProvider:        public static ColumnMapping interim(HiveColumnHandle hiveColumnHandle, int index)
        {
            checkArgument(hiveColumnHandle.getColumnType() == REGULAR);
            return new ColumnMapping(ColumnMappingKind.INTERIM, hiveColumnHandle, Optional.empty(), OptionalInt.of(index), Optional.empty());
        }