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::{prelude::*, IntoPyObjectExt};
22
23use crate::sql::logical::PyLogicalPlan;
24
25use super::logical_node::LogicalNode;
26
27#[pyclass(name = "Subquery", module = "datafusion.expr", subclass)]
28#[derive(Clone)]
29pub struct PySubquery {
30    subquery: Subquery,
31}
32
33impl From<PySubquery> for Subquery {
34    fn from(subquery: PySubquery) -> Self {
35        subquery.subquery
36    }
37}
38
39impl From<Subquery> for PySubquery {
40    fn from(subquery: Subquery) -> PySubquery {
41        PySubquery { subquery }
42    }
43}
44
45impl Display for PySubquery {
46    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
47        write!(
48            f,
49            "Subquery
50            Subquery: {:?}
51            outer_ref_columns: {:?}",
52            self.subquery.subquery, self.subquery.outer_ref_columns,
53        )
54    }
55}
56
57#[pymethods]
58impl PySubquery {
59    /// Retrieves the input `LogicalPlan` to this `Projection` node
60    fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
61        Ok(Self::inputs(self))
62    }
63
64    fn __repr__(&self) -> PyResult<String> {
65        Ok(format!("Subquery({})", self))
66    }
67
68    fn __name__(&self) -> PyResult<String> {
69        Ok("Subquery".to_string())
70    }
71}
72
73impl LogicalNode for PySubquery {
74    fn inputs(&self) -> Vec<PyLogicalPlan> {
75        vec![]
76    }
77
78    fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
79        self.clone().into_bound_py_any(py)
80    }
81}
datafusion_python/expr/subquery.rs

datafusion_python/expr/
subquery.rs
