tustvold commented on issue #3389: URL: https://github.com/apache/arrow-rs/issues/3389#issuecomment-1368909626
> In fact this may be what the IPC format requires Quite possibly, I think the field is per column and if you want to change dictionary part way through, you need to reserialize it, even if it is actually reverting to a dictionary sent before. > I believe the spec calls a new dictionary for the same field a "delta dictionary batch" The [spec](https://arrow.apache.org/docs/format/Columnar.html#dictionary-messages) states > Alternatively, if isDelta is set to false, then the dictionary replaces the existing dictionary for the same ID. So I don't think we need to support delta dictionaries in order to unblock this ticket, we can just send the entire dictionary again -- 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]
