org.apache.flink.table.catalog

Class WatermarkSpec

java.lang.Object

org.apache.flink.table.catalog.WatermarkSpec

@PublicEvolving
public final class WatermarkSpec
extends Object

Representation of a watermark specification in a ResolvedSchema.

It defines the rowtime attribute and a ResolvedExpression for watermark generation.

Method Summary

Modifier and Type	Method and Description
String	asSummaryString()
boolean	equals(Object o)
String	getRowtimeAttribute() Returns the name of a rowtime attribute.
ResolvedExpression	getWatermarkExpression() Returns the ResolvedExpression for watermark generation.
int	hashCode()
static WatermarkSpec	of(String rowtimeAttribute, ResolvedExpression watermarkExpression)
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Method Detail

of

public static WatermarkSpec of(String rowtimeAttribute,
                               ResolvedExpression watermarkExpression)

getRowtimeAttribute

public String getRowtimeAttribute()

Returns the name of a rowtime attribute.

The referenced attribute must be present in the ResolvedSchema and must be of TimestampType.

getWatermarkExpression

public ResolvedExpression getWatermarkExpression()

Returns the ResolvedExpression for watermark generation.

asSummaryString

public String asSummaryString()

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object