gravitino.dto.rel.expressions.function_arg.FunctionArg

class gravitino.dto.rel.expressions.function_arg.FunctionArg

Bases: Expression

An argument of a function.

__init__()

Methods

__init__()
arg_type()	Arguments type of the function.
children()	Returns a list of the children of this node.
references()	Returns a list of fields or columns that are referenced by this expression.
validate(columns)	Validates the function argument.

Attributes

EMPTY_ARGS
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.

class ArgType(value)

Bases: str, Enum

The type of the argument.

The supported types are:

• LITERAL: A literal argument.

• FIELD: A field argument.

• FUNCTION: A function argument.

• UNPARSED: An unparsed argument.

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 arg_type() → ArgType

Arguments type of the function.

Returns:

ArgType: The type of this argument.

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.

validate(columns: List[ColumnDTO]) → None

Validates the function argument.

Args:

columns (List[ColumnDTO]): The columns of the table.

Raises:

IllegalArgumentException: If the function argument is invalid.