datafusion_python/expr/placeholder.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
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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 datafusion::logical_expr::expr::Placeholder;
19use pyo3::prelude::*;
20
21use crate::common::data_type::PyDataType;
22
23#[pyclass(name = "Placeholder", module = "datafusion.expr", subclass)]
24#[derive(Clone)]
25pub struct PyPlaceholder {
26 placeholder: Placeholder,
27}
28
29impl From<Placeholder> for PyPlaceholder {
30 fn from(placeholder: Placeholder) -> Self {
31 PyPlaceholder { placeholder }
32 }
33}
34
35#[pymethods]
36impl PyPlaceholder {
37 fn id(&self) -> String {
38 self.placeholder.id.clone()
39 }
40
41 fn data_type(&self) -> Option<PyDataType> {
42 self.placeholder
43 .data_type
44 .as_ref()
45 .map(|e| e.clone().into())
46 }
47}