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

datafusion_python/expr/
distinct.rs
