Package org.apache.iotdb.db.mpp.plan.planner.plan.node

Class PlanNode

java.lang.Object

org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode

All Implemented Interfaces:

org.apache.iotdb.consensus.common.request.IConsensusRequest

Direct Known Subclasses:

DeleteTimeSeriesNode, ExchangeNode, InvalidateSchemaCacheNode, ProcessNode, SinkNode, SourceNode, WritePlanNode

public abstract class PlanNode
extends java.lang.Object
implements org.apache.iotdb.consensus.common.request.IConsensusRequest

The base class of query logical plan nodes, which is used to compose logical query plan.

Field Summary

Fields

Modifier and Type	Field	Description
protected static int	CHILD_COUNT_NO_LIMIT
protected static int	NO_CHILD_ALLOWED
protected static int	ONE_CHILD

Constructor Summary

Constructors

Constructor	Description
PlanNode(PlanNodeId id)

Method Summary

Modifier and Type	Method	Description
<R,C> R	accept(PlanVisitor<R,C> visitor, C context)
abstract void	addChild(PlanNode child)
abstract int	allowedChildCount()
abstract PlanNode	clone()
PlanNode	cloneWithChildren(java.util.List<PlanNode> children)
boolean	equals(java.lang.Object o)
abstract java.util.List<PlanNode>	getChildren()
abstract java.util.List<java.lang.String>	getOutputColumnNames()
PlanNodeId	getPlanNodeId()
int	hashCode()
void	serialize(java.io.DataOutputStream stream)
void	serialize(java.nio.ByteBuffer byteBuffer)
protected abstract void	serializeAttributes(java.io.DataOutputStream stream)
protected abstract void	serializeAttributes(java.nio.ByteBuffer byteBuffer)
java.nio.ByteBuffer	serializeToByteBuffer()	Deserialize via PlanNodeType.deserialize(ByteBuffer)
void	setPlanNodeId(PlanNodeId id)

Methods inherited from class java.lang.Object

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

Field Detail

NO_CHILD_ALLOWED

protected static final int NO_CHILD_ALLOWED

See Also:

Constant Field Values

ONE_CHILD

protected static final int ONE_CHILD

See Also:

Constant Field Values

CHILD_COUNT_NO_LIMIT

protected static final int CHILD_COUNT_NO_LIMIT

See Also:

Constant Field Values

Constructor Detail

PlanNode

public PlanNode(PlanNodeId id)

Method Detail

getPlanNodeId

public PlanNodeId getPlanNodeId()

setPlanNodeId

public void setPlanNodeId(PlanNodeId id)

getChildren

public abstract java.util.List<PlanNode> getChildren()

addChild

public abstract void addChild(PlanNode child)

clone

public abstract PlanNode clone()

Overrides:

clone in class java.lang.Object

cloneWithChildren

public PlanNode cloneWithChildren(java.util.List<PlanNode> children)

allowedChildCount

public abstract int allowedChildCount()

getOutputColumnNames

public abstract java.util.List<java.lang.String> getOutputColumnNames()

accept

public <R,C> R accept(PlanVisitor<R,C> visitor,
                            C context)

serialize

public void serialize(java.nio.ByteBuffer byteBuffer)

serialize

public void serialize(java.io.DataOutputStream stream)
               throws java.io.IOException

Throws:

java.io.IOException

serializeToByteBuffer

public java.nio.ByteBuffer serializeToByteBuffer()

Deserialize via PlanNodeType.deserialize(ByteBuffer)

Specified by:

serializeToByteBuffer in interface org.apache.iotdb.consensus.common.request.IConsensusRequest

serializeAttributes

protected abstract void serializeAttributes(java.nio.ByteBuffer byteBuffer)

serializeAttributes

protected abstract void serializeAttributes(java.io.DataOutputStream stream)
                                     throws java.io.IOException

Throws:

java.io.IOException

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class java.lang.Object

hashCode

public int hashCode()

Overrides:

hashCode in class java.lang.Object