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

Interface UnaryExecutableOp

All Superinterfaces:

ExecutableOperator, StatsProvider

All Known Implementing Classes:

BaseForExecOpBindJoin, BaseForExecOpBindJoinSPARQL, BaseForExecOpBindJoinWithRequestOps, BaseForExecOpIndexNestedLoopsJoin, BaseForExecOpIndexNestedLoopsJoinWithRequestOps, BaseForExecOpIndexNestedLoopsJoinWithRequests, BaseForExecOpIndexNestedLoopsJoinWithSolMapsRequests, BaseForExecOpIndexNestedLoopsJoinWithTPFRequests, ExecOpBindJoinBRTPF, ExecOpBindJoinSPARQLwithFILTER, ExecOpBindJoinSPARQLwithUNION, ExecOpBindJoinSPARQLwithVALUES, ExecOpFilter, ExecOpGlobalToLocal, ExecOpIndexNestedLoopsJoinBRTPF, ExecOpIndexNestedLoopsJoinSPARQL, ExecOpIndexNestedLoopsJoinTPF, ExecOpLocalToGlobal, ExecOpParallelMultiwayLeftJoin, UnaryExecutableOpBase, UnaryExecutableOpBaseWithIterator

public interface UnaryExecutableOp
extends ExecutableOperator

A specialization of the ExecutableOperator interface that captures executable operators that consume a single input sequence of solution mappings (which are batched into several blocks).

Method Summary

Modifier and Type	Method	Description
void	concludeExecution(IntermediateResultElementSink sink, ExecutionContext execCxt)	Concludes the execution of this operator and sends the remaining result elements (if any) to the given sink.
int	preferredInputBlockSize()	Returns the preferred block size of input blocks that are passed to this executable operator.
void	process(IntermediateResultBlock input, IntermediateResultElementSink sink, ExecutionContext execCxt)	Processes the given input and sends the produced result elements (if any) to the given sink.

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

getExceptionsCaughtDuringExecution, getStats

Methods inherited from interface se.liu.ida.hefquin.base.utils.StatsProvider

resetStats

Method Details

preferredInputBlockSize

int preferredInputBlockSize()

Returns the preferred block size of input blocks that are passed to this executable operator. A query planner may use this number as an optimization hint but it does not have to use it.

process

void process(IntermediateResultBlock input,
 IntermediateResultElementSink sink,
 ExecutionContext execCxt)
      throws ExecOpExecutionException

Processes the given input and sends the produced result elements (if any) to the given sink.

Throws:

ExecOpExecutionException

concludeExecution

void concludeExecution(IntermediateResultElementSink sink,
 ExecutionContext execCxt)
                throws ExecOpExecutionException

Concludes the execution of this operator and sends the remaining result elements (if any) to the given sink. This method will be called only once, after the sub-plan that produces the input for this operator has finished producing its result.

Throws:

ExecOpExecutionException