datafusion_python/expr/
subquery.rs

1// Licensed to the Apache Software Foundation (ASF) under one
2// or more contributor license agreements.  See the NOTICE file
3// distributed with this work for additional information
4// regarding copyright ownership.  The ASF licenses this file
5// to you under the Apache License, Version 2.0 (the
6// "License"); you may not use this file except in compliance
7// with the License.  You may obtain a copy of the License at
8//
9//   http://www.apache.org/licenses/LICENSE-2.0
10//
11// Unless required by applicable law or agreed to in writing,
12// software distributed under the License is distributed on an
13// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
14// KIND, either express or implied.  See the License for the
15// specific language governing permissions and limitations
16// under the License.
17
18use std::fmt::{self, Display, Formatter};
19
20use datafusion::logical_expr::Subquery;
21use pyo3::IntoPyObjectExt;
22use pyo3::prelude::*;
23
24use super::logical_node::LogicalNode;
25use crate::sql::logical::PyLogicalPlan;
26
27#[pyclass(
28    from_py_object,
29    frozen,
30    name = "Subquery",
31    module = "datafusion.expr",
32    subclass
33)]
34#[derive(Clone)]
35pub struct PySubquery {
36    subquery: Subquery,
37}
38
39impl From<PySubquery> for Subquery {
40    fn from(subquery: PySubquery) -> Self {
41        subquery.subquery
42    }
43}
44
45impl From<Subquery> for PySubquery {
46    fn from(subquery: Subquery) -> PySubquery {
47        PySubquery { subquery }
48    }
49}
50
51impl Display for PySubquery {
52    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
53        write!(
54            f,
55            "Subquery
56            Subquery: {:?}
57            outer_ref_columns: {:?}",
58            self.subquery.subquery, self.subquery.outer_ref_columns,
59        )
60    }
61}
62
63#[pymethods]
64impl PySubquery {
65    /// Retrieves the input `LogicalPlan` to this `Projection` node
66    fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
67        Ok(Self::inputs(self))
68    }
69
70    fn __repr__(&self) -> PyResult<String> {
71        Ok(format!("Subquery({self})"))
72    }
73
74    fn __name__(&self) -> PyResult<String> {
75        Ok("Subquery".to_string())
76    }
77}
78
79impl LogicalNode for PySubquery {
80    fn inputs(&self) -> Vec<PyLogicalPlan> {
81        vec![]
82    }
83
84    fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
85        self.clone().into_bound_py_any(py)
86    }
87}
datafusion_python/expr/subquery.rs

datafusion_python/expr/
subquery.rs
