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function.rs
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55 lines (49 loc) · 1.8 KB
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// Licensed to the Apache Software Foundation (ASF) under one
// or more contributor license agreements. See the NOTICE file
// distributed with this work for additional information
// regarding copyright ownership. The ASF licenses this file
// to you under the Apache License, Version 2.0 (the
// "License"); you may not use this file except in compliance
// with the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing,
// software distributed under the License is distributed on an
// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
// KIND, either express or implied. See the License for the
// specific language governing permissions and limitations
// under the License.
use std::collections::HashMap;
use datafusion::arrow::datatypes::DataType;
use pyo3::prelude::*;
use super::data_type::PyDataType;
#[pyclass(frozen, name = "SqlFunction", module = "datafusion.common", subclass)]
#[derive(Debug, Clone)]
pub struct SqlFunction {
pub name: String,
pub return_types: HashMap<Vec<DataType>, DataType>,
pub aggregation: bool,
}
impl SqlFunction {
pub fn new(
function_name: String,
input_types: Vec<PyDataType>,
return_type: PyDataType,
aggregation_bool: bool,
) -> Self {
let mut func = Self {
name: function_name,
return_types: HashMap::new(),
aggregation: aggregation_bool,
};
func.add_type_mapping(input_types, return_type);
func
}
pub fn add_type_mapping(&mut self, input_types: Vec<PyDataType>, return_type: PyDataType) {
self.return_types.insert(
input_types.iter().map(|t| t.clone().into()).collect(),
return_type.into(),
);
}
}