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::IntoPyObjectExt;
22use pyo3::prelude::*;
23
24use super::logical_node::LogicalNode;
25use crate::common::df_schema::PyDFSchema;
26use crate::sql::logical::PyLogicalPlan;
27
28#[pyclass(
29    from_py_object,
30    frozen,
31    name = "SubqueryAlias",
32    module = "datafusion.expr",
33    subclass
34)]
35#[derive(Clone)]
36pub struct PySubqueryAlias {
37    subquery_alias: SubqueryAlias,
38}
39
40impl From<PySubqueryAlias> for SubqueryAlias {
41    fn from(subquery_alias: PySubqueryAlias) -> Self {
42        subquery_alias.subquery_alias
43    }
44}
45
46impl From<SubqueryAlias> for PySubqueryAlias {
47    fn from(subquery_alias: SubqueryAlias) -> PySubqueryAlias {
48        PySubqueryAlias { subquery_alias }
49    }
50}
51
52impl Display for PySubqueryAlias {
53    fn fmt(&self, f: &mut Formatter) -> fmt::Result {
54        write!(
55            f,
56            "SubqueryAlias
57            Inputs(s): {:?}
58            Alias: {:?}
59            Schema: {:?}",
60            self.subquery_alias.input, self.subquery_alias.alias, self.subquery_alias.schema,
61        )
62    }
63}
64
65#[pymethods]
66impl PySubqueryAlias {
67    /// Retrieves the input `LogicalPlan` to this `Projection` node
68    fn input(&self) -> PyResult<Vec<PyLogicalPlan>> {
69        Ok(Self::inputs(self))
70    }
71
72    /// Resulting Schema for this `Projection` node instance
73    fn schema(&self) -> PyResult<PyDFSchema> {
74        Ok((*self.subquery_alias.schema).clone().into())
75    }
76
77    fn alias(&self) -> PyResult<String> {
78        Ok(self.subquery_alias.alias.to_string())
79    }
80
81    fn __repr__(&self) -> PyResult<String> {
82        Ok(format!("SubqueryAlias({self})"))
83    }
84
85    fn __name__(&self) -> PyResult<String> {
86        Ok("SubqueryAlias".to_string())
87    }
88}
89
90impl LogicalNode for PySubqueryAlias {
91    fn inputs(&self) -> Vec<PyLogicalPlan> {
92        vec![PyLogicalPlan::from((*self.subquery_alias.input).clone())]
93    }
94
95    fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {
96        self.clone().into_bound_py_any(py)
97    }
98}
datafusion_python/expr/subquery_alias.rs

datafusion_python/expr/
subquery_alias.rs
