datafusion_python/expr/
union.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::logical_plan::Union;
21use pyo3::IntoPyObjectExt;
22use pyo3::prelude::*;
23
24use crate::common::df_schema::PyDFSchema;
25use crate::expr::logical_node::LogicalNode;
26use crate::sql::logical::PyLogicalPlan;
27
28#[pyclass(
29    from_py_object,
30    frozen,
31    name = "Union",
32    module = "datafusion.expr",
33    subclass
34)]
35#[derive(Clone)]
36pub struct PyUnion {
37    union_: Union,
38}
39
40impl From<Union> for PyUnion {
41    fn from(union_: Union) -> PyUnion {
42        PyUnion { union_ }
43    }
44}
45
46impl From<PyUnion> for Union {
47    fn from(union_: PyUnion) -> Self {
48        union_.union_
49    }
50}
51
52impl Display for PyUnion {
53    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
54        write!(
55            f,
56            "Union
57            Inputs: {:?}
58            Schema: {:?}",
59            &self.union_.inputs, &self.union_.schema,
60        )
61    }
62}
63
64#[pymethods]
65impl PyUnion {
66    /// Retrieves the input `LogicalPlan` to this `Union` node
67    fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
68        Ok(Self::inputs(self))
69    }
70
71    /// Resulting Schema for this `Union` node instance
72    fn schema(&self) -> PyResult<PyDFSchema> {
73        Ok(self.union_.schema.as_ref().clone().into())
74    }
75
76    fn __repr__(&self) -> PyResult<String> {
77        Ok(format!("Union({self})"))
78    }
79
80    fn __name__(&self) -> PyResult<String> {
81        Ok("Union".to_string())
82    }
83}
84
85impl LogicalNode for PyUnion {
86    fn inputs(&self) -> Vec<PyLogicalPlan> {
87        self.union_
88            .inputs
89            .iter()
90            .map(|x| x.as_ref().clone().into())
91            .collect()
92    }
93
94    fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
95        self.clone().into_bound_py_any(py)
96    }
97}
datafusion_python/expr/union.rs

datafusion_python/expr/
union.rs
