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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::common::DataFusionError;
use datafusion::logical_expr::logical_plan::Sort;
use pyo3::IntoPyObjectExt;
use pyo3::prelude::*;
use crate::common::df_schema::PyDFSchema;
use crate::expr::logical_node::LogicalNode;
use crate::expr::sort_expr::PySortExpr;
use crate::sql::logical::PyLogicalPlan;
#[pyclass(
from_py_object,
frozen,
name = "Sort",
module = "datafusion.expr",
subclass
)]
#[derive(Clone)]
pub struct PySort {
sort: Sort,
}
impl From<Sort> for PySort {
fn from(sort: Sort) -> PySort {
PySort { sort }
}
}
impl TryFrom<PySort> for Sort {
type Error = DataFusionError;
fn try_from(agg: PySort) -> Result<Self, Self::Error> {
Ok(agg.sort)
}
}
impl Display for PySort {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(
f,
"Sort
\nExpr(s): {:?}
\nInput: {:?}
\nSchema: {:?}",
&self.sort.expr,
self.sort.input,
self.sort.input.schema()
)
}
}
#[pymethods]
impl PySort {
/// Retrieves the sort expressions for this `Sort`
fn sort_exprs(&self) -> PyResult<Vec<PySortExpr>> {
Ok(self
.sort
.expr
.iter()
.map(|e| PySortExpr::from(e.clone()))
.collect())
}
fn get_fetch_val(&self) -> PyResult<Option<usize>> {
Ok(self.sort.fetch)
}
/// Retrieves the input `LogicalPlan` to this `Sort` node
fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
Ok(Self::inputs(self))
}
/// Resulting Schema for this `Sort` node instance
fn schema(&self) -> PyDFSchema {
self.sort.input.schema().as_ref().clone().into()
}
fn __repr__(&self) -> PyResult<String> {
Ok(format!("Sort({self})"))
}
}
impl LogicalNode for PySort {
fn inputs(&self) -> Vec<PyLogicalPlan> {
vec![PyLogicalPlan::from((*self.sort.input).clone())]
}
fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
self.clone().into_bound_py_any(py)
}
}