gravitino.api.expressions.expression.Expression

class gravitino.api.expressions.expression.Expression

Bases: ABC

Base class of the public logical expression API.

__init__()

Methods

__init__()
children()	Returns a list of the children of this node.
references()	Returns a list of fields or columns that are referenced by this expression.

Attributes

EMPTY_EXPRESSION	EMPTY_EXPRESSION is only used as an input when the default children method builds the result.
EMPTY_NAMED_REFERENCE	EMPTY_NAMED_REFERENCE is only used as an input when the default references method builds the result array to avoid repeatedly allocating an empty array.

EMPTY_EXPRESSION: List[Expression] = []

EMPTY_EXPRESSION is only used as an input when the default children method builds the result.

EMPTY_NAMED_REFERENCE: List[NamedReference] = []

EMPTY_NAMED_REFERENCE is only used as an input when the default references method builds the result array to avoid repeatedly allocating an empty array.

abstract children() → List[Expression]

Returns a list of the children of this node. Children should not change.

references() → List[NamedReference]

Returns a list of fields or columns that are referenced by this expression.