Package io.trino.operator

Class AbstractRowChangeOperator

java.lang.Object

io.trino.operator.AbstractRowChangeOperator

All Implemented Interfaces:

Operator, AutoCloseable

Direct Known Subclasses:

DeleteOperator, UpdateOperator

public abstract class AbstractRowChangeOperator
extends Object
implements Operator

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected static class	AbstractRowChangeOperator.State

Field Summary

Fields

Modifier and Type	Field	Description
protected long	rowCount
protected AbstractRowChangeOperator.State	state

Fields inherited from interface io.trino.operator.Operator

NOT_BLOCKED

Constructor Summary

Constructors

Constructor	Description
AbstractRowChangeOperator(OperatorContext operatorContext)

Method Summary

Modifier and Type	Method	Description
abstract void	addInput(Page page)	Adds an input page to the operator.
void	close()	This method will always be called before releasing the Operator reference.
void	finish()	Notifies the operator that no more pages will be added and the operator should finish processing and flush results.
OperatorContext	getOperatorContext()
Page	getOutput()	Gets an output page from the operator.
com.google.common.util.concurrent.ListenableFuture<?>	isBlocked()	Returns a future that will be completed when the operator becomes unblocked.
boolean	isFinished()	Is this operator completely finished processing and no more output pages will be produced.
boolean	needsInput()	Returns true if and only if this operator can accept an input page.
protected UpdatablePageSource	pageSource()
void	setPageSource(Supplier<Optional<UpdatablePageSource>> pageSource)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.operator.Operator

finishMemoryRevoke, startMemoryRevoke

Field Detail

state

protected AbstractRowChangeOperator.State state

rowCount

protected long rowCount

Constructor Detail

AbstractRowChangeOperator

public AbstractRowChangeOperator(OperatorContext operatorContext)

Method Detail

getOperatorContext

public OperatorContext getOperatorContext()

Specified by:

getOperatorContext in interface Operator

finish

public void finish()

Description copied from interface: Operator

Notifies the operator that no more pages will be added and the operator should finish processing and flush results. This method will not be called if the Task is already failed or canceled.

Specified by:

finish in interface Operator

isFinished

public boolean isFinished()

Description copied from interface: Operator

Is this operator completely finished processing and no more output pages will be produced.

Specified by:

isFinished in interface Operator

needsInput

public boolean needsInput()

Description copied from interface: Operator

Returns true if and only if this operator can accept an input page.

Specified by:

needsInput in interface Operator

addInput

public abstract void addInput(Page page)

Description copied from interface: Operator

Adds an input page to the operator. This method will only be called if needsInput() returns true.

Specified by:

addInput in interface Operator

isBlocked

public com.google.common.util.concurrent.ListenableFuture<?> isBlocked()

Description copied from interface: Operator

Returns a future that will be completed when the operator becomes unblocked. If the operator is not blocked, this method should return NOT_BLOCKED.

Specified by:

isBlocked in interface Operator

getOutput

public Page getOutput()

Description copied from interface: Operator

Gets an output page from the operator. If no output data is currently available, return null.

Specified by:

getOutput in interface Operator

close

public void close()

Description copied from interface: Operator

This method will always be called before releasing the Operator reference.

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Operator

setPageSource

public void setPageSource(Supplier<Optional<UpdatablePageSource>> pageSource)

pageSource

protected UpdatablePageSource pageSource()