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: {:?}",
52                input,
53            ),
54            Distinct::On(distinct_on) => {
55                write!(
56                    f,
57                    "Distinct ON
58            \nInput: {:?}",
59                    distinct_on.input,
60                )
61            }
62        }
63    }
64}
65
66#[pymethods]
67impl PyDistinct {
68    /// Retrieves the input `LogicalPlan` to this `Projection` node
69    fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
70        Ok(Self::inputs(self))
71    }
72
73    fn __repr__(&self) -> PyResult<String> {
74        Ok(format!("Distinct({})", self))
75    }
76
77    fn __name__(&self) -> PyResult<String> {
78        Ok("Distinct".to_string())
79    }
80}
81
82impl LogicalNode for PyDistinct {
83    fn inputs(&self) -> Vec<PyLogicalPlan> {
84        match &self.distinct {
85            Distinct::All(input) => vec![PyLogicalPlan::from(input.as_ref().clone())],
86            Distinct::On(distinct_on) => {
87                vec![PyLogicalPlan::from(distinct_on.input.as_ref().clone())]
88            }
89        }
90    }
91
92    fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
93        self.clone().into_bound_py_any(py)
94    }
95}
datafusion_python/expr/distinct.rs

datafusion_python/expr/
distinct.rs
