org.apache.flink.table.runtime.functions.scalar

Class SourceWatermarkFunction

java.lang.Object

org.apache.flink.table.functions.UserDefinedFunction

org.apache.flink.table.functions.ScalarFunction

org.apache.flink.table.runtime.functions.scalar.BuiltInScalarFunction

org.apache.flink.table.runtime.functions.scalar.SourceWatermarkFunction

All Implemented Interfaces:

Serializable, FunctionDefinition

@Internal
public class SourceWatermarkFunction
extends BuiltInScalarFunction

Implementation of BuiltInFunctionDefinitions.SOURCE_WATERMARK.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
static String	ERROR_MESSAGE

Constructor Summary

Constructors

Constructor and Description
SourceWatermarkFunction(SpecializedFunction.SpecializedContext context)

Method Summary

Modifier and Type	Method and Description
TimestampData	eval()

Methods inherited from class org.apache.flink.table.runtime.functions.scalar.BuiltInScalarFunction

getArgumentDataTypes, getOutputDataType, getRequirements, getTypeInference, isDeterministic

Methods inherited from class org.apache.flink.table.functions.ScalarFunction

getKind, getParameterTypes, getResultType

Methods inherited from class org.apache.flink.table.functions.UserDefinedFunction

close, functionIdentifier, open, toString

Methods inherited from class java.lang.Object

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

Field Detail

ERROR_MESSAGE

public static final String ERROR_MESSAGE

Constructor Detail

SourceWatermarkFunction

public SourceWatermarkFunction(SpecializedFunction.SpecializedContext context)

Method Detail

eval

@Nullable
public TimestampData eval()