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

Class RangeUnboundedPrecedingOverFrame

java.lang.Object

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

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

All Implemented Interfaces:

Serializable, OverWindowFrame

public class RangeUnboundedPrecedingOverFrame
extends UnboundedPrecedingOverFrame

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

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

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
RangeUnboundedPrecedingOverFrame(GeneratedAggsHandleFunction aggsHandleFunction, GeneratedRecordComparator boundComparator)

Method Summary

Modifier and Type	Method and Description
void	open(ExecutionContext ctx) Open to init with ExecutionContext.
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

prepare

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

RangeUnboundedPrecedingOverFrame

public RangeUnboundedPrecedingOverFrame(GeneratedAggsHandleFunction aggsHandleFunction,
                                        GeneratedRecordComparator boundComparator)

Method Detail

open

public void open(ExecutionContext ctx)
          throws Exception

Description copied from interface: OverWindowFrame

Open to init with ExecutionContext.

Specified by:

open in interface OverWindowFrame

Overrides:

open 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