Hello Arrow devs, There's an ongoing discussion in Iceberg [1] and Parquet [2] to define and standardize new interval types. Of course, it would be ideal if these new types had a canonical representation in Arrow. While YEAR_MONTH is the same as Arrow's month interval, however, DAY_TIME is actually a 128-bit nanosecond duration and hence I don't think it can be represented by MonthDayNano or the duration type.
It might be interesting to consider whether there's some other way to encode this type in Arrow (or if an extension type should be considered), or find a way to define it that would more easily map onto an existing type (while still meeting the Iceberg goal of being ANSI SQL compatible, which apparently requires +/- 10000 years of range). [1]: https://lists.apache.org/thread/65sxmjcfpvbp262dh73v5m4zjdgzt7j1 [2]: https://github.com/apache/parquet-format/pull/496 -David
