com.mckoi.database

Class QueryPlan.BranchQueryPlanNode

java.lang.Object

com.mckoi.database.QueryPlan.BranchQueryPlanNode

All Implemented Interfaces:

QueryPlanNode, Serializable, Cloneable

Direct Known Subclasses:

QueryPlan.CompositeNode, QueryPlan.EquiJoinNode, QueryPlan.JoinNode, QueryPlan.LogicalUnionNode, QueryPlan.NaturalJoinNode, QueryPlan.NonCorrelatedAnyAllNode

Enclosing class:

QueryPlan

public abstract static class QueryPlan.BranchQueryPlanNode
extends Object
implements QueryPlanNode

A QueryPlanNode that is a branch with two child nodes.

See Also:

Serialized Form

Field Summary

Fields

Modifier and Type	Field and Description
protected QueryPlanNode	left The left and right node.
protected QueryPlanNode	right The left and right node.

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	BranchQueryPlanNode(QueryPlanNode left, QueryPlanNode right) The Constructor.

Method Summary

Modifier and Type	Method and Description
Object	clone() Deep clone.
void	debugString(int level, StringBuffer buf) Writes a textural representation of the node to the StringBuffer at the given indent level.
ArrayList	discoverCorrelatedVariables(int level, ArrayList list) Default implementation that discovers correlated variables for the given offset level.
ArrayList	discoverTableNames(ArrayList list) Default implementation delegates responsibility to children.
QueryPlanNode	left() Returns the left node.
QueryPlanNode	right() Returns the right node.
String	titleString()

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.mckoi.database.QueryPlanNode

evaluate

Field Detail

left

protected QueryPlanNode left

The left and right node.

right

protected QueryPlanNode right

The left and right node.

Constructor Detail

BranchQueryPlanNode

protected BranchQueryPlanNode(QueryPlanNode left,
                              QueryPlanNode right)

The Constructor.

Method Detail

left

public QueryPlanNode left()

Returns the left node.

right

public QueryPlanNode right()

Returns the right node.

discoverTableNames

public ArrayList discoverTableNames(ArrayList list)

Default implementation delegates responsibility to children.

Specified by:

discoverTableNames in interface QueryPlanNode

discoverCorrelatedVariables

public ArrayList discoverCorrelatedVariables(int level,
                                             ArrayList list)

Default implementation that discovers correlated variables for the given offset level.

Specified by:

discoverCorrelatedVariables in interface QueryPlanNode

clone

public Object clone()
             throws CloneNotSupportedException

Deep clone.

Specified by:

clone in interface QueryPlanNode

Overrides:

clone in class Object

Throws:

CloneNotSupportedException

titleString

public String titleString()

debugString

public void debugString(int level,
                        StringBuffer buf)

Description copied from interface: QueryPlanNode

Writes a textural representation of the node to the StringBuffer at the given indent level.

Specified by:

debugString in interface QueryPlanNode