substrait/
lib.rs

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// Copyright 2023 Greptime Team
//
// 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.

#![feature(let_chains)]

mod df_substrait;
pub mod error;
pub mod extension_serializer;

use async_trait::async_trait;
use bytes::{Buf, Bytes};
use datafusion::execution::context::SessionState;
pub use datafusion::execution::registry::SerializerRegistry;
/// Re-export the Substrait module of datafusion,
/// note this is a different version of the `substrait_proto` crate
pub use datafusion_substrait::substrait as substrait_proto_df;
pub use datafusion_substrait::{logical_plan as df_logical_plan, variation_const};
pub use substrait_proto;

pub use crate::df_substrait::DFLogicalSubstraitConvertor;
#[async_trait]
pub trait SubstraitPlan {
    type Error: std::error::Error;

    type Plan;

    async fn decode<B: Buf + Send>(
        &self,
        message: B,
        state: SessionState,
    ) -> Result<Self::Plan, Self::Error>;

    fn encode(
        &self,
        plan: &Self::Plan,
        serializer: impl SerializerRegistry + 'static,
    ) -> Result<Bytes, Self::Error>;
}