FilesExpand file tree

 main

/

join.rs

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

206 lines (177 loc) · 5.62 KB

 main

/

join.rs

Copy path

Top

File metadata and controls

• Code
• Blame

206 lines (177 loc) · 5.62 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

60

61

62

63

64

65

66

67

68

69

70

71

72

73

74

75

76

77

78

79

80

81

82

83

84

85

86

87

88

89

90

91

92

93

94

95

96

97

98

99

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

// 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::fmt::{self, Display, Formatter};

use datafusion::common::NullEquality;

use datafusion::logical_expr::logical_plan::{Join, JoinConstraint, JoinType};

use pyo3::IntoPyObjectExt;

use pyo3::prelude::*;

use crate::common::df_schema::PyDFSchema;

use crate::expr::PyExpr;

use crate::expr::logical_node::LogicalNode;

use crate::sql::logical::PyLogicalPlan;

#[derive(Debug, Clone, PartialEq, Eq, Hash)]

#[pyclass(frozen, name = "JoinType", module = "datafusion.expr")]

pub struct PyJoinType {

join_type: JoinType,

}

impl From<JoinType> for PyJoinType {

fn from(join_type: JoinType) -> PyJoinType {

PyJoinType { join_type }

}

}

impl From<PyJoinType> for JoinType {

fn from(join_type: PyJoinType) -> Self {

join_type.join_type

}

}

#[pymethods]

impl PyJoinType {

pub fn is_outer(&self) -> bool {

self.join_type.is_outer()

}

fn __repr__(&self) -> PyResult<String> {

Ok(format!("{}", self.join_type))

}

}

impl Display for PyJoinType {

fn fmt(&self, f: &mut Formatter) -> fmt::Result {

write!(f, "{}", self.join_type)

}

}

#[derive(Debug, Clone, Copy)]

#[pyclass(frozen, name = "JoinConstraint", module = "datafusion.expr")]

pub struct PyJoinConstraint {

join_constraint: JoinConstraint,

}

impl From<JoinConstraint> for PyJoinConstraint {

fn from(join_constraint: JoinConstraint) -> PyJoinConstraint {

PyJoinConstraint { join_constraint }

}

}

impl From<PyJoinConstraint> for JoinConstraint {

fn from(join_constraint: PyJoinConstraint) -> Self {

join_constraint.join_constraint

}

}

#[pymethods]

impl PyJoinConstraint {

fn __repr__(&self) -> PyResult<String> {

match self.join_constraint {

JoinConstraint::On => Ok("On".to_string()),

JoinConstraint::Using => Ok("Using".to_string()),

}

}

}

#[pyclass(frozen, name = "Join", module = "datafusion.expr", subclass)]

#[derive(Clone)]

pub struct PyJoin {

join: Join,

}

impl From<Join> for PyJoin {

fn from(join: Join) -> PyJoin {

PyJoin { join }

}

}

impl From<PyJoin> for Join {

fn from(join: PyJoin) -> Self {

join.join

}

}

impl Display for PyJoin {

fn fmt(&self, f: &mut Formatter) -> fmt::Result {

write!(

f,

"Join

Left: {:?}

Right: {:?}

On: {:?}

Filter: {:?}

JoinType: {:?}

JoinConstraint: {:?}

Schema: {:?}

NullEquality: {:?}",

&self.join.left,

&self.join.right,

&self.join.on,

&self.join.filter,

&self.join.join_type,

&self.join.join_constraint,

&self.join.schema,

&self.join.null_equality,

)

}

}

#[pymethods]

impl PyJoin {

/// Retrieves the left input `LogicalPlan` to this `Join` node

fn left(&self) -> PyResult<PyLogicalPlan> {

Ok(self.join.left.as_ref().clone().into())

}

/// Retrieves the right input `LogicalPlan` to this `Join` node

fn right(&self) -> PyResult<PyLogicalPlan> {

Ok(self.join.right.as_ref().clone().into())

}

/// Retrieves the right input `LogicalPlan` to this `Join` node

fn on(&self) -> PyResult<Vec<(PyExpr, PyExpr)>> {

Ok(self

.join

.on

.iter()

.map(|(l, r)| (PyExpr::from(l.clone()), PyExpr::from(r.clone())))

.collect())

}

/// Retrieves the filter `Option<PyExpr>` of this `Join` node

fn filter(&self) -> PyResult<Option<PyExpr>> {

Ok(self.join.filter.clone().map(Into::into))

}

/// Retrieves the `JoinType` to this `Join` node

fn join_type(&self) -> PyResult<PyJoinType> {

Ok(self.join.join_type.into())

}

/// Retrieves the `JoinConstraint` to this `Join` node

fn join_constraint(&self) -> PyResult<PyJoinConstraint> {

Ok(self.join.join_constraint.into())

}

/// Resulting Schema for this `Join` node instance

fn schema(&self) -> PyResult<PyDFSchema> {

Ok(self.join.schema.as_ref().clone().into())

}

/// If null_equals_null is true, null == null else null != null

fn null_equals_null(&self) -> PyResult<bool> {

match self.join.null_equality {

NullEquality::NullEqualsNothing => Ok(false),

NullEquality::NullEqualsNull => Ok(true),

}

}

fn __repr__(&self) -> PyResult<String> {

Ok(format!("Join({self})"))

}

fn __name__(&self) -> PyResult<String> {

Ok("Join".to_string())

}

}

impl LogicalNode for PyJoin {

fn inputs(&self) -> Vec<PyLogicalPlan> {

vec![

PyLogicalPlan::from((*self.join.left).clone()),

PyLogicalPlan::from((*self.join.right).clone()),

]

}

fn to_variant<'py>(&self, py: Python<'py>) -> PyResult<Bound<'py, PyAny>> {

self.clone().into_bound_py_any(py)

}

}