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repartition.rs
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127 lines (108 loc) · 3.84 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 std::fmt::{self, Display, Formatter};
use datafusion::logical_expr::{logical_plan::Repartition, Expr, Partitioning};
use pyo3::{prelude::*, IntoPyObjectExt};
use crate::{errors::py_type_err, sql::logical::PyLogicalPlan};
use super::{logical_node::LogicalNode, PyExpr};
#[pyclass(name = "Repartition", module = "datafusion.expr", subclass)]
#[derive(Clone)]
pub struct PyRepartition {
repartition: Repartition,
}
#[pyclass(name = "Partitioning", module = "datafusion.expr", subclass)]
#[derive(Clone)]
pub struct PyPartitioning {
partitioning: Partitioning,
}
impl From<PyPartitioning> for Partitioning {
fn from(partitioning: PyPartitioning) -> Self {
partitioning.partitioning
}
}
impl From<Partitioning> for PyPartitioning {
fn from(partitioning: Partitioning) -> Self {
PyPartitioning { partitioning }
}
}
impl From<PyRepartition> for Repartition {
fn from(repartition: PyRepartition) -> Self {
repartition.repartition
}
}
impl From<Repartition> for PyRepartition {
fn from(repartition: Repartition) -> PyRepartition {
PyRepartition { repartition }
}
}
impl Display for PyRepartition {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(
f,
"Repartition
input: {:?}
partitioning_scheme: {:?}",
&self.repartition.input, &self.repartition.partitioning_scheme,
)
}
}
#[pymethods]
impl PyRepartition {
fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
Ok(Self::inputs(self))
}
fn partitioning_scheme(&self) -> PyResult<PyPartitioning> {
Ok(PyPartitioning {
partitioning: self.repartition.partitioning_scheme.clone(),
})
}
fn distribute_list(&self) -> PyResult<Vec<PyExpr>> {
match &self.repartition.partitioning_scheme {
Partitioning::DistributeBy(distribute_list) => Ok(distribute_list
.iter()
.map(|e| PyExpr::from(e.clone()))
.collect()),
_ => Err(py_type_err("unexpected repartition strategy")),
}
}
fn distribute_columns(&self) -> PyResult<String> {
match &self.repartition.partitioning_scheme {
Partitioning::DistributeBy(distribute_list) => Ok(distribute_list
.iter()
.map(|e| match &e {
Expr::Column(column) => column.name.clone(),
_ => panic!("Encountered a type other than Expr::Column"),
})
.collect()),
_ => Err(py_type_err("unexpected repartition strategy")),
}
}
fn __repr__(&self) -> PyResult<String> {
Ok(format!("Repartition({self})"))
}
fn __name__(&self) -> PyResult<String> {
Ok("Repartition".to_string())
}
}
impl LogicalNode for PyRepartition {
fn inputs(&self) -> Vec<PyLogicalPlan> {
vec![PyLogicalPlan::from((*self.repartition.input).clone())]
}
fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
self.clone().into_bound_py_any(py)
}
}