org.apache.gravitino.rel.expressions

Interface FunctionExpression

All Superinterfaces:

Expression

All Known Implementing Classes:

FuncExpressionDTO, FunctionExpression.FuncExpressionImpl

@Evolving
public interface FunctionExpression
extends Expression

The interface of a function expression. A function expression is an expression that takes a function name and a list of arguments.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	FunctionExpression.FuncExpressionImpl A FunctionExpression implementation

Field Summary

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

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
Expression[]	arguments()
default Expression[]	children()
java.lang.String	functionName()
static FunctionExpression.FuncExpressionImpl	of(java.lang.String functionName) Creates a new FunctionExpression with the given function name and no arguments.
static FunctionExpression.FuncExpressionImpl	of(java.lang.String functionName, Expression... arguments) Creates a new FunctionExpression with the given function name and arguments.

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

references

Method Detail

of

static FunctionExpression.FuncExpressionImpl of(java.lang.String functionName,
                                                Expression... arguments)

Creates a new FunctionExpression with the given function name and arguments.

Parameters:

functionName - The name of the function

arguments - The arguments to the function

Returns:

The created FunctionExpression

of

static FunctionExpression.FuncExpressionImpl of(java.lang.String functionName)

Creates a new FunctionExpression with the given function name and no arguments.

Parameters:

functionName - The name of the function

Returns:

The created FunctionExpression

functionName

java.lang.String functionName()

Returns:

The transform function name.

arguments

Expression[] arguments()

Returns:

The arguments passed to the transform function.

children

default Expression[] children()

Specified by:

children in interface Expression

Returns:

An array of the children of this node. Children should not change.