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

@Internal
public class SourceWatermarkFunction
extends BuiltInScalarFunction

Implementation of BuiltInFunctionDefinitions.SOURCE_WATERMARK.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static String	ERROR_MESSAGE

Constructor Summary

Constructors

Constructor	Description
SourceWatermarkFunction(org.apache.flink.table.functions.SpecializedFunction.SpecializedContext context)

Method Summary

Modifier and Type	Method	Description
org.apache.flink.table.data.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

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

supportsConstantFolding

Field Detail

ERROR_MESSAGE

public static final String ERROR_MESSAGE

Constructor Detail

SourceWatermarkFunction

public SourceWatermarkFunction(org.apache.flink.table.functions.SpecializedFunction.SpecializedContext context)

Method Detail

eval

@Nullable
public org.apache.flink.table.data.TimestampData eval()