Raccoon.QE
Class QueryNode

java.lang.Object
  Raccoon.QE.QueryNode

public class QueryNode

extends java.lang.Object

QueryNode : Class of Node in a SQL parse tree: LOCAL_SEL, NEIGHBOR_JOIN and PROJECT

Author:

Qi Zhong

Field Summary

boolean	bSelAll
static int	LOCAL_SEL This kind of node only do the selection local.
static int	NEIGHBOR_JOIN The kind of node do the join on its left child and its right child.
java.lang.String	nodeName
int	nodeType
static int	PROJECT The kind if node do the project on the result of its left child.
QueryEngine	qe
java.lang.String	relName

Constructor Summary

QueryNode(QueryEngine newQE)

Method Summary

void	AddJoinCondition(CONDITION cond)
void	AddLocalSelAttr(java.lang.String attrName)
void	AddLocalSelCondition(CONDITION cond)
void	AddProjAttributes(RELATTR attr)
int	Close()
int	DoIt()
int	DoJoin()
int	DoProject()
int	DoSel()
int	GetNodeType()
PVInstance	getResult()
java.util.Vector	joinVector(java.util.Vector leftVec, java.util.Vector rightVec)
void	removeDuplicte(java.util.Vector v)
void	SetLeafNodeName(java.lang.String nodename)
void	SetLeafRelName(java.lang.String relname)
void	SetLeftNode(QueryNode node)
void	SetNodeType(int type)
void	SetProjAttributes(java.util.Vector selAttr)
void	SetRightNode(QueryNode node)
void	setSelAll(boolean flag)
static java.util.Vector	SubsetVector(java.util.Vector v, int[] indexArr) return a subset of Vector only consisting index specified in the indexArr.

Methods inherited from class java.lang.Object

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

Field Detail

LOCAL_SEL

public static final int LOCAL_SEL

This kind of node only do the selection local. They are typically the leaf of the parse tree.

See Also:

Constant Field Values

NEIGHBOR_JOIN

public static final int NEIGHBOR_JOIN

The kind of node do the join on its left child and its right child.

See Also:

Constant Field Values

PROJECT

public static final int PROJECT

The kind if node do the project on the result of its left child. It is usually the topmost node that finally select the attributes of the join result.

See Also:

Constant Field Values

qe

public QueryEngine qe

nodeType

public int nodeType

relName

public java.lang.String relName

nodeName

public java.lang.String nodeName

bSelAll

public boolean bSelAll

Constructor Detail

QueryNode

public QueryNode(QueryEngine newQE)

Method Detail

setSelAll

public void setSelAll(boolean flag)

SetLeafNodeName

public void SetLeafNodeName(java.lang.String nodename)

SetLeafRelName

public void SetLeafRelName(java.lang.String relname)

SetNodeType

public void SetNodeType(int type)

AddJoinCondition

public void AddJoinCondition(CONDITION cond)

AddProjAttributes

public void AddProjAttributes(RELATTR attr)

SetProjAttributes

public void SetProjAttributes(java.util.Vector selAttr)

AddLocalSelCondition

public void AddLocalSelCondition(CONDITION cond)

AddLocalSelAttr

public void AddLocalSelAttr(java.lang.String attrName)

SetLeftNode

public void SetLeftNode(QueryNode node)

SetRightNode

public void SetRightNode(QueryNode node)

DoIt

public int DoIt()
         throws java.sql.SQLException,
                PVException

Throws:

java.sql.SQLException

PVException

DoProject

public int DoProject()
              throws java.sql.SQLException,
                     PVException

Throws:

java.sql.SQLException

PVException

DoSel

public int DoSel()
          throws java.sql.SQLException,
                 PVException

Throws:

java.sql.SQLException

PVException

DoJoin

public int DoJoin()
           throws java.sql.SQLException,
                  PVException

Throws:

java.sql.SQLException

PVException

getResult

public PVInstance getResult()

joinVector

public java.util.Vector joinVector(java.util.Vector leftVec,
                                   java.util.Vector rightVec)

Close

public int Close()

GetNodeType

public int GetNodeType()

removeDuplicte

public void removeDuplicte(java.util.Vector v)

SubsetVector

public static java.util.Vector SubsetVector(java.util.Vector v,
                                            int[] indexArr)

return a subset of Vector only consisting index specified in the indexArr.