org.apache.flink.table.runtime.operators.over.frame

Class RowUnboundedPrecedingOverFrame

java.lang.Object

org.apache.flink.table.runtime.operators.over.frame.UnboundedPrecedingOverFrame

org.apache.flink.table.runtime.operators.over.frame.RowUnboundedPrecedingOverFrame

All Implemented Interfaces:

Serializable, OverWindowFrame

public class RowUnboundedPrecedingOverFrame
extends UnboundedPrecedingOverFrame

The row UnboundPreceding window frame calculates frames with the following SQL form: ... ROW BETWEEN UNBOUNDED PRECEDING AND [window frame following] [window frame following] ::= [unsigned_value_specification] FOLLOWING | CURRENT ROW

e.g.: ... ROW BETWEEN UNBOUNDED PRECEDING AND 1 FOLLOWING.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RowUnboundedPrecedingOverFrame(GeneratedAggsHandleFunction aggsHandleFunction, long rightBound)

Method Summary

Modifier and Type	Method and Description
void	prepare(ResettableExternalBuffer rows) Prepare for next partition.
BaseRow	process(int index, BaseRow current) return the ACC of the window frame.

Methods inherited from class org.apache.flink.table.runtime.operators.over.frame.UnboundedPrecedingOverFrame

open

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.flink.table.runtime.operators.over.frame.OverWindowFrame

getNextOrNull

Constructor Detail

RowUnboundedPrecedingOverFrame

public RowUnboundedPrecedingOverFrame(GeneratedAggsHandleFunction aggsHandleFunction,
                                      long rightBound)

Method Detail

prepare

public void prepare(ResettableExternalBuffer rows)
             throws Exception

Description copied from interface: OverWindowFrame

Prepare for next partition.

Specified by:

prepare in interface OverWindowFrame

Overrides:

prepare in class UnboundedPrecedingOverFrame

Throws:

Exception

process

public BaseRow process(int index,
                       BaseRow current)
                throws Exception

Description copied from interface: OverWindowFrame

return the ACC of the window frame.

Throws:

Exception