datafusion_python/common/
function.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::collections::HashMap;
19
20use datafusion::arrow::datatypes::DataType;
21use pyo3::prelude::*;
22
23use super::data_type::PyDataType;
24
25#[pyclass(name = "SqlFunction", module = "datafusion.common", subclass)]
26#[derive(Debug, Clone)]
27pub struct SqlFunction {
28    pub name: String,
29    pub return_types: HashMap<Vec<DataType>, DataType>,
30    pub aggregation: bool,
31}
32
33impl SqlFunction {
34    pub fn new(
35        function_name: String,
36        input_types: Vec<PyDataType>,
37        return_type: PyDataType,
38        aggregation_bool: bool,
39    ) -> Self {
40        let mut func = Self {
41            name: function_name,
42            return_types: HashMap::new(),
43            aggregation: aggregation_bool,
44        };
45        func.add_type_mapping(input_types, return_type);
46        func
47    }
48
49    pub fn add_type_mapping(&mut self, input_types: Vec<PyDataType>, return_type: PyDataType) {
50        self.return_types.insert(
51            input_types.iter().map(|t| t.clone().into()).collect(),
52            return_type.into(),
53        );
54    }
55}
datafusion_python/common/function.rs

datafusion_python/common/
function.rs
