Package org.apache.flink.table.runtime.operators.window.tvf.unslicing

Class UnsliceAssigners

java.lang.Object

org.apache.flink.table.runtime.operators.window.tvf.unslicing.UnsliceAssigners

@Internal
public class UnsliceAssigners
extends Object

Utilities to create UnsliceAssigners.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	UnsliceAssigners.SessionUnsliceAssigner	The UnsliceAssigner for session windows.
static class	UnsliceAssigners.WindowedUnsliceAssigner	The UnsliceAssigner for elements have been merged into unslicing windows and attached window start and end timestamps.

Constructor Summary

Constructors

Constructor	Description
UnsliceAssigners()

Method Summary

Modifier and Type	Method	Description
static UnsliceAssigners.SessionUnsliceAssigner	session(int rowtimeIndex, ZoneId shiftTimeZone, Duration gap)	Creates a session window UnsliceAssigner that assigns elements to windows based on the timestamp.
static UnsliceAssigners.WindowedUnsliceAssigner	windowed(int windowStartIndex, int windowEndIndex, UnsliceAssigner<TimeWindow> innerAssigner)	Creates a UnsliceAssigner that assigns elements which has been attached window start and window end timestamp to windows.

Methods inherited from class java.lang.Object

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

Constructor Detail

UnsliceAssigners

public UnsliceAssigners()

Method Detail

session

public static UnsliceAssigners.SessionUnsliceAssigner session(int rowtimeIndex,
                                                              ZoneId shiftTimeZone,
                                                              Duration gap)

Creates a session window UnsliceAssigner that assigns elements to windows based on the timestamp.

Parameters:

rowtimeIndex - The index of rowtime field in the input row, -1 if based on processing time.

shiftTimeZone - The shift timezone of the window, if the proctime or rowtime type is TIMESTAMP_LTZ, the shift timezone is the timezone user configured in TableConfig, other cases the timezone is UTC which means never shift when assigning windows.

gap - The session timeout, i.e. the time gap between sessions

windowed

public static UnsliceAssigners.WindowedUnsliceAssigner windowed(int windowStartIndex,
                                                                int windowEndIndex,
                                                                UnsliceAssigner<TimeWindow> innerAssigner)

Creates a UnsliceAssigner that assigns elements which has been attached window start and window end timestamp to windows. The assigned windows doesn't need to be merged again.

Parameters:

windowStartIndex - the index of window start field in the input row, mustn't be a negative value.

windowEndIndex - the index of window end field in the input row, mustn't be a negative value.