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158 lines (140 loc) · 5.07 KB
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you 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 pyo3::{prelude::*, types::PyBytes};
use crate::context::PySessionContext;
use crate::errors::{py_datafusion_err, PyDataFusionError, PyDataFusionResult};
use crate::sql::logical::PyLogicalPlan;
use crate::utils::wait_for_future;
use datafusion_substrait::logical_plan::{consumer, producer};
use datafusion_substrait::serializer;
use datafusion_substrait::substrait::proto::Plan;
use prost::Message;
#[pyclass(name = "Plan", module = "datafusion.substrait", subclass)]
#[derive(Debug, Clone)]
pub struct PyPlan {
pub plan: Plan,
}
#[pymethods]
impl PyPlan {
fn encode(&self, py: Python) -> PyResult<PyObject> {
let mut proto_bytes = Vec::<u8>::new();
self.plan
.encode(&mut proto_bytes)
.map_err(PyDataFusionError::EncodeError)?;
Ok(PyBytes::new(py, &proto_bytes).into())
}
}
impl From<PyPlan> for Plan {
fn from(plan: PyPlan) -> Plan {
plan.plan
}
}
impl From<Plan> for PyPlan {
fn from(plan: Plan) -> PyPlan {
PyPlan { plan }
}
}
/// A PySubstraitSerializer is a representation of a Serializer that is capable of both serializing
/// a `LogicalPlan` instance to Substrait Protobuf bytes and also deserialize Substrait Protobuf bytes
/// to a valid `LogicalPlan` instance.
#[pyclass(name = "Serde", module = "datafusion.substrait", subclass)]
#[derive(Debug, Clone)]
pub struct PySubstraitSerializer;
#[pymethods]
impl PySubstraitSerializer {
#[staticmethod]
pub fn serialize(
sql: &str,
ctx: PySessionContext,
path: &str,
py: Python,
) -> PyDataFusionResult<()> {
wait_for_future(py, serializer::serialize(sql, &ctx.ctx, path))??;
Ok(())
}
#[staticmethod]
pub fn serialize_to_plan(
sql: &str,
ctx: PySessionContext,
py: Python,
) -> PyDataFusionResult<PyPlan> {
PySubstraitSerializer::serialize_bytes(sql, ctx, py).and_then(|proto_bytes| {
let proto_bytes = proto_bytes.bind(py).downcast::<PyBytes>().unwrap();
PySubstraitSerializer::deserialize_bytes(proto_bytes.as_bytes().to_vec(), py)
})
}
#[staticmethod]
pub fn serialize_bytes(
sql: &str,
ctx: PySessionContext,
py: Python,
) -> PyDataFusionResult<PyObject> {
let proto_bytes: Vec<u8> =
wait_for_future(py, serializer::serialize_bytes(sql, &ctx.ctx))??;
Ok(PyBytes::new(py, &proto_bytes).into())
}
#[staticmethod]
pub fn deserialize(path: &str, py: Python) -> PyDataFusionResult<PyPlan> {
let plan = wait_for_future(py, serializer::deserialize(path))??;
Ok(PyPlan { plan: *plan })
}
#[staticmethod]
pub fn deserialize_bytes(proto_bytes: Vec<u8>, py: Python) -> PyDataFusionResult<PyPlan> {
let plan = wait_for_future(py, serializer::deserialize_bytes(proto_bytes))??;
Ok(PyPlan { plan: *plan })
}
}
#[pyclass(name = "Producer", module = "datafusion.substrait", subclass)]
#[derive(Debug, Clone)]
pub struct PySubstraitProducer;
#[pymethods]
impl PySubstraitProducer {
/// Convert DataFusion LogicalPlan to Substrait Plan
#[staticmethod]
pub fn to_substrait_plan(plan: PyLogicalPlan, ctx: &PySessionContext) -> PyResult<PyPlan> {
let session_state = ctx.ctx.state();
match producer::to_substrait_plan(&plan.plan, &session_state) {
Ok(plan) => Ok(PyPlan { plan: *plan }),
Err(e) => Err(py_datafusion_err(e)),
}
}
}
#[pyclass(name = "Consumer", module = "datafusion.substrait", subclass)]
#[derive(Debug, Clone)]
pub struct PySubstraitConsumer;
#[pymethods]
impl PySubstraitConsumer {
/// Convert Substrait Plan to DataFusion DataFrame
#[staticmethod]
pub fn from_substrait_plan(
ctx: &mut PySessionContext,
plan: PyPlan,
py: Python,
) -> PyDataFusionResult<PyLogicalPlan> {
let session_state = ctx.ctx.state();
let result = consumer::from_substrait_plan(&session_state, &plan.plan);
let logical_plan = wait_for_future(py, result)??;
Ok(PyLogicalPlan::new(logical_plan))
}
}
pub fn init_module(m: &Bound<'_, PyModule>) -> PyResult<()> {
m.add_class::<PyPlan>()?;
m.add_class::<PySubstraitConsumer>()?;
m.add_class::<PySubstraitProducer>()?;
m.add_class::<PySubstraitSerializer>()?;
Ok(())
}