andygrove opened a new issue, #37:
URL: https://github.com/apache/datafusion-java/issues/37
### Is your feature request related to a problem or challenge?
DataFusion 53.1 supports Arrow IPC files via
`SessionContext::read_arrow` / `register_arrow`. Since results already
return to the JVM as Arrow batches over the C Data Interface, being
able to round-trip through Arrow IPC files is a natural fit and the
cheapest format to integrate.
### Describe the solution you'd like
- Add an `ArrowReadOptions` value class (file extension, schema).
- Add `proto/arrow_read_options.proto` and pass options through the
proto-over-JNI convention (#29).
- Expose `SessionContext.registerArrow(name, path[, options])` and
`readArrow(path[, options])`.
- Cover with tests; can write fixtures with arrow-vector's own IPC
writer to keep test deps minimal.
### Describe alternatives you've considered
`CREATE EXTERNAL TABLE … STORED AS ARROW` via SQL.
### Additional context
In the default DataFusion feature set; no Cargo flag changes required.
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