datafusion_python/expr/
subquery_alias.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::SubqueryAlias;
21use pyo3::prelude::*;
22use pyo3::IntoPyObjectExt;
23
24use super::logical_node::LogicalNode;
25use crate::common::df_schema::PyDFSchema;
26use crate::sql::logical::PyLogicalPlan;
27
28#[pyclass(frozen, name = "SubqueryAlias", module = "datafusion.expr", subclass)]
29#[derive(Clone)]
30pub struct PySubqueryAlias {
31    subquery_alias: SubqueryAlias,
32}
33
34impl From<PySubqueryAlias> for SubqueryAlias {
35    fn from(subquery_alias: PySubqueryAlias) -> Self {
36        subquery_alias.subquery_alias
37    }
38}
39
40impl From<SubqueryAlias> for PySubqueryAlias {
41    fn from(subquery_alias: SubqueryAlias) -> PySubqueryAlias {
42        PySubqueryAlias { subquery_alias }
43    }
44}
45
46impl Display for PySubqueryAlias {
47    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
48        write!(
49            f,
50            "SubqueryAlias
51            Inputs(s): {:?}
52            Alias: {:?}
53            Schema: {:?}",
54            self.subquery_alias.input, self.subquery_alias.alias, self.subquery_alias.schema,
55        )
56    }
57}
58
59#[pymethods]
60impl PySubqueryAlias {
61    /// Retrieves the input `LogicalPlan` to this `Projection` node
62    fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
63        Ok(Self::inputs(self))
64    }
65
66    /// Resulting Schema for this `Projection` node instance
67    fn schema(&self) -> PyResult<PyDFSchema> {
68        Ok((*self.subquery_alias.schema).clone().into())
69    }
70
71    fn alias(&self) -> PyResult<String> {
72        Ok(self.subquery_alias.alias.to_string())
73    }
74
75    fn __repr__(&self) -> PyResult<String> {
76        Ok(format!("SubqueryAlias({self})"))
77    }
78
79    fn __name__(&self) -> PyResult<String> {
80        Ok("SubqueryAlias".to_string())
81    }
82}
83
84impl LogicalNode for PySubqueryAlias {
85    fn inputs(&self) -> Vec<PyLogicalPlan> {
86        vec![PyLogicalPlan::from((*self.subquery_alias.input).clone())]
87    }
88
89    fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
90        self.clone().into_bound_py_any(py)
91    }
92}
datafusion_python/expr/subquery_alias.rs

datafusion_python/expr/
subquery_alias.rs
