Interface NaryPhysicalOp

All Superinterfaces:

PhysicalOperator, QueryPlanOperator

All Known Subinterfaces:

NaryPhysicalOpForLogicalOp

All Known Implementing Classes:

BaseForPhysicalOpMultiwayJoin, BaseForPhysicalOpMultiwayLeftJoin, PhysicalOpMultiwayUnion

public interface NaryPhysicalOp
extends PhysicalOperator

An interface for any type of PhysicalOperator whose algorithm consumes an arbitrary number of sequences of solution mappings as input.

Method Summary

Modifier and Type	Method	Description
NaryExecutableOp	createExecOp(boolean collectExceptions, QueryPlanningInfo qpInfo, ExpectedVariables... inputVars)	Creates and returns the executable operator to be used for this physical operator.

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

visit

Methods inherited from interface se.liu.ida.hefquin.engine.queryplan.base.QueryPlanOperator

getExpectedVariables

Method Details

createExecOp

NaryExecutableOp 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).

Specified by:

createExecOp in interface PhysicalOperator