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(
26    from_py_object,
27    frozen,
28    name = "SqlFunction",
29    module = "datafusion.common",
30    subclass
31)]
32#[derive(Debug, Clone)]
33pub struct SqlFunction {
34    pub name: String,
35    pub return_types: HashMap<Vec<DataType>, DataType>,
36    pub aggregation: bool,
37}
38
39impl SqlFunction {
40    pub fn new(
41        function_name: String,
42        input_types: Vec<PyDataType>,
43        return_type: PyDataType,
44        aggregation_bool: bool,
45    ) -> Self {
46        let mut func = Self {
47            name: function_name,
48            return_types: HashMap::new(),
49            aggregation: aggregation_bool,
50        };
51        func.add_type_mapping(input_types, return_type);
52        func
53    }
54
55    pub fn add_type_mapping(&mut self, input_types: Vec<PyDataType>, return_type: PyDataType) {
56        self.return_types.insert(
57            input_types.iter().map(|t| t.clone().into()).collect(),
58            return_type.into(),
59        );
60    }
61}
datafusion_python/common/function.rs

datafusion_python/common/
function.rs
