Package se.liu.ida.hefquin.engine.queryplan.executable.impl.ops

Class BaseForExecOpIndexNestedLoopsJoin<QueryType extends Query,MemberType extends FederationMember>

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.UnaryExecutableOpBase

se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOpIndexNestedLoopsJoin<QueryType,MemberType>

All Implemented Interfaces:

StatsProvider, ExecutableOperator, UnaryExecutableOp

Direct Known Subclasses:

BaseForExecOpIndexNestedLoopsJoinWithRequestOps, BaseForExecOpIndexNestedLoopsJoinWithRequests

public abstract class BaseForExecOpIndexNestedLoopsJoin<QueryType extends Query,MemberType extends FederationMember>
extends UnaryExecutableOpBase

An abstract base class for implementations of the (external) index nested loops join algorithm.

Field Summary

Fields

Modifier and Type	Field	Description
protected final MemberType	fm
protected final QueryType	query

Fields inherited from class se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.UnaryExecutableOpBase

timeAtCurrentProcStart

Fields inherited from class se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

collectExceptions

Constructor Summary

Constructors

Constructor	Description
BaseForExecOpIndexNestedLoopsJoin(QueryType query, MemberType fm, boolean collectExceptions)

Method Summary

Modifier and Type	Method	Description
protected void	_concludeExecution(IntermediateResultElementSink sink, ExecutionContext execCxt)	Implementations of this function need to conclude the execution of this operator and send the remaining result elements (if any) to the given sink.
protected ExecutableOperatorStatsImpl	createStats()

Methods inherited from class se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.UnaryExecutableOpBase

_process, concludeExecution, getStats, process, resetStats

Methods inherited from class se.liu.ida.hefquin.engine.queryplan.executable.impl.ops.BaseForExecOps

getExceptionsCaughtDuringExecution, recordExceptionCaughtDuringExecution

Methods inherited from class java.lang.Object

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

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.executable.ExecutableOperator

getExceptionsCaughtDuringExecution

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.executable.UnaryExecutableOp

preferredInputBlockSize

Field Details

query

protected final QueryType extends Query query

fm

protected final MemberType extends FederationMember fm

Constructor Details

BaseForExecOpIndexNestedLoopsJoin

public BaseForExecOpIndexNestedLoopsJoin(QueryType query,
 MemberType fm,
 boolean collectExceptions)

Method Details

_concludeExecution

protected void _concludeExecution(IntermediateResultElementSink sink,
 ExecutionContext execCxt)

Description copied from class: UnaryExecutableOpBase

Implementations of this function need to conclude the execution of this operator and send the remaining result elements (if any) to the given sink. If an exception occurs during this process, then this exception needs to either be collected or be thrown, depending on whether BaseForExecOps.collectExceptions is set to true.

Specified by:

_concludeExecution in class UnaryExecutableOpBase

createStats

protected ExecutableOperatorStatsImpl createStats()

Overrides:

createStats in class UnaryExecutableOpBase