Package io.prestosql.operator

Class DynamicFilterSourceOperator

java.lang.Object

io.prestosql.operator.DynamicFilterSourceOperator

All Implemented Interfaces:

Operator, AutoCloseable

public class DynamicFilterSourceOperator
extends Object
implements Operator

This operator acts as a simple "pass-through" pipe, while saving its input pages. The collected pages' value are used for creating a run-time filtering constraint (for probe-side table scan in an inner join). We record all values for the run-time filter only for small build-side pages (which should be the case when using "broadcast" join). For large inputs on build side, we can optionally record the min and max values per channel for orderable types (except Double and Real).

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DynamicFilterSourceOperator.Channel
static class	DynamicFilterSourceOperator.DynamicFilterSourceOperatorFactory

Field Summary

Fields inherited from interface io.prestosql.operator.Operator

NOT_BLOCKED

Method Summary

Modifier and Type	Method	Description
void	addInput(Page page)	Adds an input page to the operator.
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.
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.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.prestosql.operator.Operator

close, finishMemoryRevoke, isBlocked, startMemoryRevoke

Method Detail

getOperatorContext

public OperatorContext getOperatorContext()

Specified by:

getOperatorContext 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 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

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

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