org.apache.gravitino.dto.rel.expressions

Interface FunctionArg

All Superinterfaces:

Expression

All Known Implementing Classes:

FieldReferenceDTO, FuncExpressionDTO, LiteralDTO, UnparsedExpressionDTO

public interface FunctionArg
extends Expression

An argument of a function.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	FunctionArg.ArgType The type of the argument.

Field Summary

Fields

Modifier and Type	Field and Description
static FunctionArg[]	EMPTY_ARGS Constant for an empty array of function arguments.

Fields inherited from interface org.apache.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
FunctionArg.ArgType	argType() Arguments type of the function.
default void	validate(ColumnDTO[] columns) Validates the function argument.

Methods inherited from interface org.apache.gravitino.rel.expressions.Expression

children, references

Field Detail

EMPTY_ARGS

static final FunctionArg[] EMPTY_ARGS

Constant for an empty array of function arguments.

Method Detail

argType

FunctionArg.ArgType argType()

Arguments type of the function.

Returns:

The type of the argument.

validate

default void validate(ColumnDTO[] columns)
               throws java.lang.IllegalArgumentException

Validates the function argument.

Parameters:

columns - The columns of the table.

Throws:

java.lang.IllegalArgumentException - If the function argument is invalid.