You can combine multiple schemas into a single schema as a union of struct types (since a struct is effectively the same as a batch), that is the closest thing you can get to having two separate schemas within one IPC stream right now. There was some discussion of various ways to relax this before [1] but the discussion died, I think because there were several distinct concepts being tied up into "schema evolution".
[1]: https://lists.apache.org/thread/zs31trnyhbofhvndtdrrvkvm82p8pscq -David On Wed, Sep 7, 2022, at 16:59, Olo Sawyerr wrote: > Hi, > > Hope you're well. > > I'm using arrow flight JAVA client -> GO Server. I'm trying to return 2 > RecordBatches from the server to the client using a single ticket in a DoGet. > Both RecordBatches have different schemas (length an width) but they are a > "Pair" of results and belong / are generated together. What's the cleanest > way to achieve this using the DoGet? > > I initially thought of sending one RecordBatch as metadata and the other as > the Record payload. But this didn't feel natural. > > Any ideas? > > Regards, > > Olo
