davidhewitt opened a new issue, #7683: URL: https://github.com/apache/arrow-rs/issues/7683
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Related to #7185. It would be nice to also be able to compact dictionary arrays on IPC write. A first step would be to add a `DictionaryArray::gc` method. **Describe the solution you'd like** Calling this method would rebuild the dictionary's `values` array such that all unreferenced values are discarded. The `keys` array will need rebuilding too given the indices of the values array will be changed by the gc. A relatively trivial implementation will just use dictionary builders to create new arrays, feeding the builder all current values and letting it create a new keys array. I don't know if that's considered prohibitive for code bloat reasons due to the combination of `K` and `V` generic parameters. **Describe alternatives you've considered** None so far. **Additional context** None so far. -- 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]
