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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::Unnest;
use pyo3::IntoPyObjectExt;
use pyo3::prelude::*;
use crate::common::df_schema::PyDFSchema;
use crate::expr::logical_node::LogicalNode;
use crate::sql::logical::PyLogicalPlan;
#[pyclass(
from_py_object,
frozen,
name = "Unnest",
module = "datafusion.expr",
subclass
)]
#[derive(Clone)]
pub struct PyUnnest {
unnest_: Unnest,
}
impl From<Unnest> for PyUnnest {
fn from(unnest_: Unnest) -> PyUnnest {
PyUnnest { unnest_ }
}
}
impl From<PyUnnest> for Unnest {
fn from(unnest_: PyUnnest) -> Self {
unnest_.unnest_
}
}
impl Display for PyUnnest {
fn fmt(&self, f: &mut Formatter) -> fmt::Result {
write!(
f,
"Unnest
Inputs: {:?}
Schema: {:?}",
&self.unnest_.input, &self.unnest_.schema,
)
}
}
#[pymethods]
impl PyUnnest {
/// Retrieves the input `LogicalPlan` to this `Unnest` node
fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
Ok(Self::inputs(self))
}
/// Resulting Schema for this `Unnest` node instance
fn schema(&self) -> PyResult<PyDFSchema> {
Ok(self.unnest_.schema.as_ref().clone().into())
}
fn __repr__(&self) -> PyResult<String> {
Ok(format!("Unnest({self})"))
}
fn __name__(&self) -> PyResult<String> {
Ok("Unnest".to_string())
}
}
impl LogicalNode for PyUnnest {
fn inputs(&self) -> Vec<PyLogicalPlan> {
vec![PyLogicalPlan::from((*self.unnest_.input).clone())]
}
fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
self.clone().into_bound_py_any(py)
}
}