llama90 opened a new issue, #38490: URL: https://github.com/apache/arrow/issues/38490
### Describe the enhancement requested To support join operations for the `DictionaryType`, sorting operations of indices related to the `DictionaryType` in a `ChunkedArray` is required (This applies to `ChunkedArray`, `RecordBatch`, and `Table` alike). From a data structure perspective, the support for the `DictionaryType` within `Array` and `ChunkedArray`, as well as between `RecordBatch` and `Table`, appeared to be similar. For instance, based on the sorting of `Array` and `RecordBatch`, there's a need to merge the sorted data structures for `ChunkedArray` and `Table` respectively. Sorting for the `DictionaryType` within `Array` is already supported, so sorting for `ChunkedArray` is needed. In this context, I've observed that sorting for the `DictionaryType` internally takes place based on the `Rank` of the dictionaries. In any case, before supporting the `DictionaryType` for `ChunkedArray` based on the algorithm for the `DictionaryType` in `Array`, it seems necessary to pave the way. Given the similarities, this would then allow for support in `RecordBatch` and `Table`. I've created a separate issue for this. ### Component(s) C++ -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
