org.apache.flink.table.runtime.functions

Class BuiltInSpecializedFunction

java.lang.Object

org.apache.flink.table.runtime.functions.BuiltInSpecializedFunction

All Implemented Interfaces:

org.apache.flink.table.functions.FunctionDefinition, org.apache.flink.table.functions.SpecializedFunction

Direct Known Subclasses:

UnnestRowsFunction

@Internal
public abstract class BuiltInSpecializedFunction
extends Object
implements org.apache.flink.table.functions.SpecializedFunction

Base class for built-in functions that need another level of specialization via SpecializedFunction.specialize(SpecializedContext).

Subclasses can create a specific UDF runtime implementation targeted to the given (fully known) arguments and derived output type. Subclasses must provide a default constructor.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.flink.table.functions.SpecializedFunction

org.apache.flink.table.functions.SpecializedFunction.ExpressionEvaluator, org.apache.flink.table.functions.SpecializedFunction.ExpressionEvaluatorFactory, org.apache.flink.table.functions.SpecializedFunction.SpecializedContext

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BuiltInSpecializedFunction(org.apache.flink.table.functions.BuiltInFunctionDefinition definition)

Method Summary

Modifier and Type	Method and Description
org.apache.flink.table.functions.FunctionKind	getKind()
Set<org.apache.flink.table.functions.FunctionRequirement>	getRequirements()
org.apache.flink.table.types.inference.TypeInference	getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)
boolean	isDeterministic()

Methods inherited from class java.lang.Object

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

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

specialize

Constructor Detail

BuiltInSpecializedFunction

protected BuiltInSpecializedFunction(org.apache.flink.table.functions.BuiltInFunctionDefinition definition)

Method Detail

getKind

public org.apache.flink.table.functions.FunctionKind getKind()

Specified by:

getKind in interface org.apache.flink.table.functions.FunctionDefinition

getTypeInference

public org.apache.flink.table.types.inference.TypeInference getTypeInference(org.apache.flink.table.catalog.DataTypeFactory typeFactory)

Specified by:

getTypeInference in interface org.apache.flink.table.functions.FunctionDefinition

getRequirements

public Set<org.apache.flink.table.functions.FunctionRequirement> getRequirements()

Specified by:

getRequirements in interface org.apache.flink.table.functions.FunctionDefinition

isDeterministic

public boolean isDeterministic()

Specified by:

isDeterministic in interface org.apache.flink.table.functions.FunctionDefinition