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

Class RowSlidingOverFrame

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, OverWindowFrame

public class RowSlidingOverFrame
extends SlidingOverFrame

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

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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RowSlidingOverFrame(org.apache.flink.table.types.logical.RowType inputType, org.apache.flink.table.types.logical.RowType valueType, GeneratedAggsHandleFunction aggsHandleFunction, long leftBound, 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.SlidingOverFrame

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

RowSlidingOverFrame

public RowSlidingOverFrame(org.apache.flink.table.types.logical.RowType inputType,
                           org.apache.flink.table.types.logical.RowType valueType,
                           GeneratedAggsHandleFunction aggsHandleFunction,
                           long leftBound,
                           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 SlidingOverFrame

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