pyarrow.gandiva.TreeExprBuilder¶

class pyarrow.gandiva.TreeExprBuilder¶

Bases: pyarrow.lib._Weakrefable

Builder class used to generate Gandiva expression nodes.

__init__()¶: Initialize self. See help(type(self)) for accurate signature.

Methods

`__init__`()	Initialize self.
`make_and`(self, children)	Create an ‘and’ Node.
`make_condition`(self, Node condition)	Create a Condition from a boolean node.
`make_expression`(self, Node root_node, …)	Create an Expression from a Node and an output Field.
`make_field`(self, Field field)	Create a field node, representing a column in a record batch.
`make_function`(self, name, children, …)	Create a function node.
`make_if`(self, Node condition, …)	Create an if-else node.
`make_in_expression`(self, Node node, values, …)	Create a Node representing an ‘is in’ check.
`make_literal`(self, value, dtype)	Create a node representing a literal value.
`make_or`(self, children)	Create an ‘or’ Node.

make_and(self, children)¶

Create an ‘and’ Node.

Parameters: children (Iterable[Node]) – Boolean nodes to ‘and’ together
Returns: Node

make_condition(self, Node condition)¶

Create a Condition from a boolean node.

make_expression(self, Node root_node, Field return_field)¶

Create an Expression from a Node and an output Field.

Parameters

root_node (Node) – Node representing expression
return_field (pyarrow.Field) – PyArrow field to use in projected result for the expression

Returns

Expression

make_field(self, Field field)¶

Create a field node, representing a column in a record batch.

make_function(self, name, children, DataType return_type)¶

Create a function node.

Will match to a registered Gandiva function based on the name, children data types, and return_type.

Parameters

Returns

Node