Sergei Grebnov
e5ad232c90
# Which issue does this PR close? PR updates FlightSQL `GetDbSchemas` and `GetTables` schemas to fully match the FlightSQL protocol (fields nullability). Fixes - https://github.com/apache/arrow-rs/issues/7637 # Are there any user-facing changes? It could technically be considered a user-facing breaking change, as the schema returned by the `CommandGetDbSchemas` and `CommandGetTables` FlightSQL commands will change. However, since the change only affects field nullability, there should be no practical impact, or it is very unlikely.
Apache Arrow Flight
See the API documentation for examples and the full API.
The API documentation for most recent, unreleased code is available here.
Usage
Add this to your Cargo.toml:
[dependencies]
arrow-flight = "54.0.0"
Apache Arrow Flight is a gRPC based protocol for exchanging Arrow data between processes. See the blog post Introducing Apache Arrow Flight: A Framework for Fast Data Transport for more information.
This crate provides a Rust implementation of the Flight.proto gRPC protocol and examples that demonstrate how to build a Flight server implemented with tonic.
Feature Flags
-
flight-sql: Enables experimental support for Apache Arrow FlightSQL, a protocol for interacting with SQL databases. -
flight-sql-experimental: Deprecated feature and will be removed in next release -
tls: Enablestlsontonic
CLI
This crates offers a basic Apache Arrow FlightSQL command line interface.
The client can be installed from the repository:
$ cargo install --features=cli,flight-sql,tls --bin=flight_sql_client --path=. --locked
The client comes with extensive help text:
$ flight_sql_client help
A query can be executed using:
$ flight_sql_client --host example.com statement-query "SELECT 1;"
+----------+
| Int64(1) |
+----------+
| 1 |
+----------+