Class PhysicalOpBindJoinBRTPF

java.lang.Object

se.liu.ida.hefquin.engine.queryplan.physical.impl.BaseForPhysicalOpSingleInputJoin

se.liu.ida.hefquin.engine.queryplan.physical.impl.PhysicalOpBindJoinBRTPF

All Implemented Interfaces:

QueryPlanOperator, PhysicalOperator, PhysicalOperatorForLogicalOperator, UnaryPhysicalOp, UnaryPhysicalOpForLogicalOp

public class PhysicalOpBindJoinBRTPF
extends BaseForPhysicalOpSingleInputJoin

A physical operator that implements (a batching version of) the bind join algorithm for cases in which the federation member accessed by the algorithm supports the brTPF interface.

Semantics: This operator implements the logical operators gpAdd (see LogicalOpGPAdd) and gpOptAdd (see LogicalOpGPOptAdd). That is, for a given triple pattern, a federation member, and an input sequence of solution mappings (produced by the sub-plan under this operator), the operator produces the solutions resulting from the join (inner or left outer) between the input solutions and the solutions of evaluating the given triple pattern over the data of the federation member.

Algorithm description: For a detailed description of the actual algorithm associated with this physical operator, refer to ExecOpSequentialBindJoinBRTPF, which provides the implementation of this algorithm.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	PhysicalOpBindJoinBRTPF.Factory

Field Summary

Fields

Modifier and Type	Field	Description
protected final int	batchSize
protected static final PhysicalOpBindJoinBRTPF.Factory	factory

Fields inherited from class se.liu.ida.hefquin.engine.queryplan.physical.impl.BaseForPhysicalOpSingleInputJoin

lop

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	PhysicalOpBindJoinBRTPF(LogicalOpGPAdd lop, int batchSize)
protected	PhysicalOpBindJoinBRTPF(LogicalOpGPOptAdd lop, int batchSize)

Method Summary

Modifier and Type	Method	Description
UnaryExecutableOp	createExecOp(boolean collectExceptions, QueryPlanningInfo qpInfo, ExpectedVariables... inputVars)	Creates and returns the executable operator to be used for this physical operator.
boolean	equals(Object o)
static PhysicalOpFactory	getFactory()
int	hashCode()
String	toString()
void	visit(PhysicalPlanVisitor visitor)

Methods inherited from class se.liu.ida.hefquin.engine.queryplan.physical.impl.BaseForPhysicalOpSingleInputJoin

getLogicalOperator

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.physical.PhysicalOperatorForLogicalOperator

getExpectedVariables

Field Details

factory

protected static final PhysicalOpBindJoinBRTPF.Factory factory

batchSize

protected final int batchSize

Constructor Details

PhysicalOpBindJoinBRTPF

protected PhysicalOpBindJoinBRTPF(LogicalOpGPAdd lop,
 int batchSize)

PhysicalOpBindJoinBRTPF

protected PhysicalOpBindJoinBRTPF(LogicalOpGPOptAdd lop,
 int batchSize)

Method Details

getFactory

public static PhysicalOpFactory getFactory()

createExecOp

public UnaryExecutableOp createExecOp(boolean collectExceptions,
 QueryPlanningInfo qpInfo,
 ExpectedVariables... inputVars)

Description copied from interface: PhysicalOperator

Creates and returns the executable operator to be used for this physical operator. The implementation of this method has to create a new ExecutableOperator object each time it is called. The given QueryPlanningInfo object is passed to the created executable operator (to be available via the ExecutableOperator.getQueryPlanningInfo() method) and should be taken from the physical plan whose root operator is this physical operator. The given collectExceptions flag is passed to the executable operator and determines whether that operator collects its exceptions (see ExecutableOperator.getExceptionsCaughtDuringExecution()) or throws them immediately. The number of ExpectedVariables objects passed as arguments to this method must be in line with the degree of this operator (e.g., for a unary operator, exactly one such object must be passed).

visit

public void visit(PhysicalPlanVisitor visitor)

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object