trxcllnt commented on issue #41683: URL: https://github.com/apache/arrow/issues/41683#issuecomment-2147992575
IIRC Dictionaries were initially spec'd as immutable. I do recall implementing delta dictionaries, but it seems like around that time [the spec](https://arrow.apache.org/docs/format/Columnar.html#dictionary-messages) was updated such that later DictionaryMessages should replace existing DictionaryMessages, and I just didn't catch it. Specifically this section: > Alternatively, if `isDelta` is set to false, then the dictionary replaces the existing dictionary for the same ID. I think this should be a straightforward fix, I'll try to file a PR soon. -- 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]
