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

Class BaseForPhysicalOpSingleInputJoin

java.lang.Object

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

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

All Implemented Interfaces:

PhysicalOperator, PhysicalOperatorForLogicalOperator, UnaryPhysicalOp, UnaryPhysicalOpForLogicalOp

Direct Known Subclasses:

PhysicalOpBindJoin, PhysicalOpBindJoinWithFILTER, PhysicalOpBindJoinWithUNION, PhysicalOpBindJoinWithVALUES, PhysicalOpIndexNestedLoopsJoin

public abstract class BaseForPhysicalOpSingleInputJoin
extends BaseForPhysicalOps
implements UnaryPhysicalOpForLogicalOp

Base class for physical operators that implement some form of a join algorithm that consumes only one input and produces the other input as part of the algorithm itself.

Field Summary

Fields

Modifier and Type	Field	Description
protected final UnaryLogicalOp	lop

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

id

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	BaseForPhysicalOpSingleInputJoin(UnaryLogicalOp lop)	The given logical operator is expected to be of one of the following six types: LogicalOpTPAdd, LogicalOpTPOptAdd, LogicalOpBGPAdd, LogicalOpBGPOptAdd, LogicalOpGPAdd, or LogicalOpGPOptAdd.

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
ExpectedVariables	getExpectedVariables(ExpectedVariables... inputVars)	Returns the variables that can be expected in the solution mappings produced by this operator if the input(s) to this operator contain solutions mappings with the given set(s) of variables.
UnaryLogicalOp	getLogicalOperator()	Returns the logical operator implemented by this physical operator.
int	hashCode()

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

getID

Methods inherited from class java.lang.Object

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

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

getID, visit

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

createExecOp

Field Details

lop

protected final UnaryLogicalOp lop

Constructor Details

BaseForPhysicalOpSingleInputJoin

protected BaseForPhysicalOpSingleInputJoin(UnaryLogicalOp lop)

The given logical operator is expected to be of one of the following six types: LogicalOpTPAdd, LogicalOpTPOptAdd, LogicalOpBGPAdd, LogicalOpBGPOptAdd, LogicalOpGPAdd, or LogicalOpGPOptAdd.

Method Details

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

getLogicalOperator

public UnaryLogicalOp getLogicalOperator()

Description copied from interface: PhysicalOperatorForLogicalOperator

Returns the logical operator implemented by this physical operator.

Specified by:

getLogicalOperator in interface PhysicalOperatorForLogicalOperator

Specified by:

getLogicalOperator in interface UnaryPhysicalOpForLogicalOp

getExpectedVariables

public ExpectedVariables getExpectedVariables(ExpectedVariables... inputVars)

Description copied from interface: PhysicalOperator

Returns the variables that can be expected in the solution mappings produced by this operator if the input(s) to this operator contain solutions mappings with the given set(s) of variables. The number of ExpectedVariables objects passed 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:

getExpectedVariables in interface PhysicalOperator