org.apache.flink.table.functions

Class BuiltInFunctionDefinition

java.lang.Object

org.apache.flink.table.functions.BuiltInFunctionDefinition

All Implemented Interfaces:

FunctionDefinition

@Internal
public final class BuiltInFunctionDefinition
extends Object
implements FunctionDefinition

Definition of a built-in function. It enables unique identification across different modules by reference equality.

Compared to regular FunctionDefinition, built-in functions have a default name. This default name is used to lookup the function in a catalog during resolution.

Equality is defined by reference equality.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	BuiltInFunctionDefinition.Builder Builder for fluent definition of built-in functions.

Method Summary

Modifier and Type	Method and Description
FunctionKind	getKind() Returns the kind of function this definition describes.
String	getName()
TypeInference	getTypeInference() Currently, the type inference is just exposed here.
String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.flink.table.functions.FunctionDefinition

getRequirements, isDeterministic

Method Detail

getName

public String getName()

getTypeInference

public TypeInference getTypeInference()

Currently, the type inference is just exposed here. In the future, function definition will require it.

getKind

public FunctionKind getKind()

Description copied from interface: FunctionDefinition

Returns the kind of function this definition describes.

Specified by:

getKind in interface FunctionDefinition

toString

public String toString()

Overrides:

toString in class Object