org.apache.drill.exec.physical.impl

Interface RootExec

All Superinterfaces:

AutoCloseable

All Known Implementing Classes:

BaseRootExec, BroadcastSenderRootExec, PartitionSenderRootExec, ScreenCreator.ScreenRoot, SingleSenderCreator.SingleSenderRootExec

public interface RootExec
extends AutoCloseable

A FragmentRoot is a node which is the last processing node in a query plan. FragmentTerminals include Exchange output nodes and storage nodes. They are there driving force behind the completion of a query.

Method Summary

Methods

Modifier and Type	Method and Description
boolean	next() Do the next batch of work.
void	receivingFragmentFinished(ExecProtos.FragmentHandle handle) Inform sender that receiving fragment is finished and doesn't need any more data

Methods inherited from interface java.lang.AutoCloseable

close

Method Detail

next

boolean next()

Do the next batch of work.

Returns:

Whether or not additional batches of work are necessary. False means that this fragment is done.

receivingFragmentFinished

void receivingFragmentFinished(ExecProtos.FragmentHandle handle)

Inform sender that receiving fragment is finished and doesn't need any more data

Parameters:

handle -