arrow-udf-flight 0.4.2

Client for remote Arrow UDFs.
Documentation 
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// Copyright 2024 RisingWave Labs
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

use arrow_flight::error::FlightError;
use thiserror::Error;

/// A specialized `Result` type for UDF operations.
pub type Result<T, E = Error> = std::result::Result<T, E>;

/// The error type for UDF operations.
#[derive(Error, Debug)]
pub enum Error {
    #[error("failed to send requests to UDF service: {0}")]
    Tonic(#[from] tonic::Status),

    #[error("failed to connect to UDF service: {0}")]
    Connect(#[from] tonic::transport::Error),

    #[error("failed to call UDF: {0}")]
    Flight(#[from] FlightError),

    #[error("arrow error: {0}")]
    Arrow(#[from] arrow_schema::ArrowError),

    #[error("invalid message from UDF service: {0}")]
    Decode(String),

    #[error("Flight service error: {0}")]
    Service(String),
}