org.apache.tajo.plan.logical

Class ScanNode

java.lang.Object

org.apache.tajo.plan.logical.LogicalNode

org.apache.tajo.plan.logical.RelationNode

org.apache.tajo.plan.logical.ScanNode

All Implemented Interfaces:

Cloneable, GsonObject, Projectable, SelectableNode

Direct Known Subclasses:

IndexScanNode, PartitionedTableScanNode

public class ScanNode
extends RelationNode
implements Projectable, SelectableNode, Cloneable

Field Summary

Fields

Modifier and Type	Field and Description
protected String	alias
protected boolean	broadcastTable
protected Schema	logicalSchema
protected EvalNode	qual
protected TableDesc	tableDesc
protected Target[]	targets

Constructor Summary

Constructors

Modifier	Constructor and Description
	ScanNode(int pid)
protected	ScanNode(int pid, NodeType nodeType)

Method Summary

Methods

Modifier and Type	Method and Description
int	childNum()
Object	clone()
boolean	equals(Object obj)
String	getAlias()
String	getCanonicalName()
LogicalNode	getChild(int idx)
Schema	getLogicalSchema()
Schema	getPhysicalSchema()
PlanString	getPlanString()
EvalNode	getQual() Get a filter condition
TableDesc	getTableDesc()
String	getTableName()
Target[]	getTargets() Get a list of targets
boolean	hasAlias()
int	hashCode()
boolean	hasQual() Checking if it has filter condition
boolean	hasTargets() check if this node has a target list
void	init(TableDesc desc)
void	init(TableDesc desc, String alias)
boolean	isBroadcastTable()
static boolean	isScanNode(LogicalNode node)
void	postOrder(LogicalNodeVisitor visitor)
void	preOrder(LogicalNodeVisitor visitor)
void	setBroadcastTable(boolean broadcastTable)
void	setQual(EvalNode evalTree) Set a filter condition.
void	setTargets(Target[] targets) Set a target list
String	toString()

Methods inherited from class org.apache.tajo.plan.logical.LogicalNode

deepEquals, getCost, getInSchema, getOutSchema, getPID, getType, setCost, setInSchema, setOutSchema, setPID, setType, toJson

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.tajo.plan.logical.Projectable

getInSchema, getOutSchema, getPID

Field Detail

tableDesc

protected TableDesc tableDesc

alias

protected String alias

logicalSchema

protected Schema logicalSchema

qual

protected EvalNode qual

targets

protected Target[] targets

broadcastTable

protected boolean broadcastTable

Constructor Detail

ScanNode

protected ScanNode(int pid,
        NodeType nodeType)

ScanNode

public ScanNode(int pid)

Method Detail

childNum

public int childNum()

Specified by:

childNum in class LogicalNode

getChild

public LogicalNode getChild(int idx)

Specified by:

getChild in class LogicalNode

init

public void init(TableDesc desc)

init

public void init(TableDesc desc,
        String alias)

getTableName

public String getTableName()

Specified by:

getTableName in class RelationNode

hasAlias

public boolean hasAlias()

Specified by:

hasAlias in class RelationNode

getAlias

public String getAlias()

Specified by:

getAlias in class RelationNode

setBroadcastTable

public void setBroadcastTable(boolean broadcastTable)

isBroadcastTable

public boolean isBroadcastTable()

getCanonicalName

public String getCanonicalName()

Specified by:

getCanonicalName in class RelationNode

getLogicalSchema

public Schema getLogicalSchema()

Specified by:

getLogicalSchema in class RelationNode

getPhysicalSchema

public Schema getPhysicalSchema()

hasQual

public boolean hasQual()

Description copied from interface: SelectableNode

Checking if it has filter condition

Specified by:

hasQual in interface SelectableNode

Returns:

True if it has filter condition. Otherwise, it will return false.

getQual

public EvalNode getQual()

Description copied from interface: SelectableNode

Get a filter condition

Specified by:

getQual in interface SelectableNode

Returns:

Filter Condition

setQual

public void setQual(EvalNode evalTree)

Description copied from interface: SelectableNode

Set a filter condition.

Specified by:

setQual in interface SelectableNode

Parameters:

evalTree - EvalNode resulting in a boolean result.

hasTargets

public boolean hasTargets()

Description copied from interface: Projectable

check if this node has a target list

Specified by:

hasTargets in interface Projectable

Returns:

TRUE if this node has a target list. Otherwise, FALSE.

setTargets

public void setTargets(Target[] targets)

Description copied from interface: Projectable

Set a target list

Specified by:

setTargets in interface Projectable

Parameters:

targets - The array of targets

getTargets

public Target[] getTargets()

Description copied from interface: Projectable

Get a list of targets

Specified by:

getTargets in interface Projectable

Returns:

The array of targets

getTableDesc

public TableDesc getTableDesc()

toString

public String toString()

Overrides:

toString in class LogicalNode

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class LogicalNode

clone

public Object clone()
             throws CloneNotSupportedException

Overrides:

clone in class LogicalNode

Throws:

CloneNotSupportedException

preOrder

public void preOrder(LogicalNodeVisitor visitor)

Specified by:

preOrder in class LogicalNode

postOrder

public void postOrder(LogicalNodeVisitor visitor)

Specified by:

postOrder in class LogicalNode

getPlanString

public PlanString getPlanString()

Specified by:

getPlanString in class LogicalNode

isScanNode

public static boolean isScanNode(LogicalNode node)