datafusion_python/expr/
lambda_variable.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::expr::LambdaVariable;
21use pyo3::prelude::*;
22
23#[pyclass(
24    from_py_object,
25    frozen,
26    name = "LambdaVariable",
27    module = "datafusion.expr",
28    subclass
29)]
30#[derive(Clone)]
31pub struct PyLambdaVariable {
32    variable: LambdaVariable,
33}
34
35impl From<LambdaVariable> for PyLambdaVariable {
36    fn from(variable: LambdaVariable) -> PyLambdaVariable {
37        PyLambdaVariable { variable }
38    }
39}
40
41impl From<PyLambdaVariable> for LambdaVariable {
42    fn from(variable: PyLambdaVariable) -> Self {
43        variable.variable
44    }
45}
46
47impl Display for PyLambdaVariable {
48    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
49        write!(f, "LambdaVariable({})", &self.variable.name)
50    }
51}
52
53#[pymethods]
54impl PyLambdaVariable {
55    /// Reference name of the lambda parameter.
56    fn name(&self) -> String {
57        self.variable.name.clone()
58    }
59
60    fn __repr__(&self) -> PyResult<String> {
61        Ok(format!("LambdaVariable({self})"))
62    }
63
64    fn __name__(&self) -> PyResult<String> {
65        Ok("LambdaVariable".to_string())
66    }
67}
datafusion_python/expr/lambda_variable.rs

datafusion_python/expr/
lambda_variable.rs
