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

Class UnboundedPrecedingOverFrame

java.lang.Object

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

All Implemented Interfaces:

Serializable, OverWindowFrame

Direct Known Subclasses:

RangeUnboundedPrecedingOverFrame, RowUnboundedPrecedingOverFrame

public abstract class UnboundedPrecedingOverFrame
extends Object
implements OverWindowFrame

The UnboundedPreceding window frame. See RowUnboundedPrecedingOverFrame and RangeUnboundedPrecedingOverFrame.

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
UnboundedPrecedingOverFrame(GeneratedAggsHandleFunction aggsHandleFunction)

Method Summary

Modifier and Type	Method and Description
void	open(ExecutionContext ctx) Open to init with ExecutionContext.
void	prepare(ResettableExternalBuffer rows) Prepare for next partition.

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, process

Constructor Detail

UnboundedPrecedingOverFrame

public UnboundedPrecedingOverFrame(GeneratedAggsHandleFunction aggsHandleFunction)

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

Throws:

Exception

prepare

public void prepare(ResettableExternalBuffer rows)
             throws Exception

Description copied from interface: OverWindowFrame

Prepare for next partition.

Specified by:

prepare in interface OverWindowFrame

Throws:

Exception