pyarrow.substrait.BoundExpressions

class pyarrow.substrait.BoundExpressions

Bases: _Weakrefable

A collection of named expressions and the schema they are bound to

This is equivalent to the Substrait ExtendedExpression message

__init__(*args, **kwargs)

Methods

__init__(*args, **kwargs)
from_substrait(cls, message)	Convert a Substrait message into a BoundExpressions object

Attributes

expressions	A dict from expression name to expression
schema	The common schema that all expressions are bound to

expressions

A dict from expression name to expression

classmethod from_substrait(cls, message)

Convert a Substrait message into a BoundExpressions object

Parameters:

messageBuffer or bytes or protobuf Message

The message to convert to a BoundExpressions object

Returns:

BoundExpressions

The converted expressions, their names, and the bound schema

schema

The common schema that all expressions are bound to