alamb opened a new issue #1323: URL: https://github.com/apache/arrow-rs/issues/1323
**Is your feature request related to a problem or challenge? Please describe what you are trying to do.** Arrow Flight SQL has just been officially announced https://arrow.apache.org/blog/2022/02/16/introducing-arrow-flight-sql/ It would be very cool if we had a Rust implementation of this protocol to make it easier to build systems in Rust that used this efficient new protocol and would allow better ecosystem integration. Self servingly, we would likely use it in [influxdb_iox](https://github.com/influxdata/influxdb_iox) and contribute to such an implementation, but it isn't high on our priority list quite yet. **Describe the solution you'd like** I propose creating an `ArrowFlightSQLService` type structure that handles the protocol details, and present an idiomatic rust `trait` for users. Something like: ```rust pub trait SqlService { /// get list of database schemas as an array of Strings fn schemas(&self, catalog_name: Option<&str>, db_schema_filter_pattern: Option<&str>) -> Result<ArrayRef>; /// Execute the query and return an async stream of record batches fn query(&self, sql: &str) -> Result<SendableRecordBatchStream>; ... } /// Implementation of Arrow Flight SQL for a `SqlService` struct <S: SqlService> ArrowFlightSQLService<S> { inner: S } /// implement service from https://github.com/apache/arrow/blob/release-7.0.0/format/Flight.proto /// That handles messages in https://github.com/apache/arrow/blob/release-7.0.0/format/FlightSql.proto impl protobuf::generated::FlightService for ArrowFlightSQLService { ... code to translate to/from protobuf messages } ``` **Describe alternatives you've considered** One alternative is to make this part of the official arrow-rs release (perhaps with a `sql` feature in the `arrow-flight` crate)? Another alternative is to make this a separate project (e.g. in https://github.com/apache/arrow-datafusion or in https://github.com/datafusion-contrib ) **Additional context** [DataFusion](https://arrow.apache.org/datafusion/) -- 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]
