Package org.apache.flink.table.api

Class Session

java.lang.Object

org.apache.flink.table.api.Session

@PublicEvolving
public final class Session
extends Object

Helper class for creating a session window. The boundary of session windows are defined by intervals of inactivity, i.e., a session window is closes if no event appears for a defined gap period.

Java Example:

 Session.withGap("10.minutes").on("rowtime").as("w")
 

Scala Example:

 Session withGap 10.minutes on 'rowtime as 'w
 

Constructor Summary

Constructors

Constructor	Description
Session()

Method Summary

Modifier and Type	Method	Description
static SessionWithGap	withGap(org.apache.flink.table.expressions.Expression gap)	Creates a session window.

Methods inherited from class java.lang.Object

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

Constructor Details

Session

public Session()

Method Details

withGap

public static SessionWithGap withGap(org.apache.flink.table.expressions.Expression gap)

Creates a session window. The boundary of session windows are defined by intervals of inactivity, i.e., a session window is closes if no event appears for a defined gap period.

Parameters:

gap - specifies how long (as interval of milliseconds) to wait for new data before closing the session window.

Returns:

a partially defined session window