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

Class DeviceViewNode

java.lang.Object

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

org.apache.iotdb.db.mpp.plan.planner.plan.node.process.ProcessNode

org.apache.iotdb.db.mpp.plan.planner.plan.node.process.MultiChildNode

org.apache.iotdb.db.mpp.plan.planner.plan.node.process.DeviceViewNode

All Implemented Interfaces:

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

public class DeviceViewNode
extends MultiChildNode

DeviceViewNode is responsible for constructing a device-based view of a set of series. And output the result with specific order. The order could be 'order by device' or 'order by timestamp'

Each output from its children should have the same schema. That means, the columns should be same between these TsBlocks. If the input TsBlock contains n columns, the device-based view will contain n+1 columns where the new column is Device column.

Field Summary

Fields inherited from class org.apache.iotdb.db.mpp.plan.planner.plan.node.process.MultiChildNode

children

Fields inherited from class org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode

CHILD_COUNT_NO_LIMIT, NO_CHILD_ALLOWED, ONE_CHILD

Constructor Summary

Constructors

Constructor	Description
DeviceViewNode(PlanNodeId id, OrderByParameter mergeOrderParameter, java.util.List<java.lang.String> outputColumnNames, java.util.List<java.lang.String> devices, java.util.Map<java.lang.String,java.util.List<java.lang.Integer>> deviceToMeasurementIndexesMap)
DeviceViewNode(PlanNodeId id, OrderByParameter mergeOrderParameter, java.util.List<java.lang.String> outputColumnNames, java.util.Map<java.lang.String,java.util.List<java.lang.Integer>> deviceToMeasurementIndexesMap)

Method Summary

Modifier and Type	Method	Description
<R,C> R	accept(PlanVisitor<R,C> visitor, C context)
void	addChild(PlanNode child)
void	addChildDeviceNode(java.lang.String deviceName, PlanNode childNode)
int	allowedChildCount()
PlanNode	clone()
static DeviceViewNode	deserialize(java.nio.ByteBuffer byteBuffer)
boolean	equals(java.lang.Object o)
java.util.List<PlanNode>	getChildren()
java.util.List<java.lang.String>	getDevices()
java.util.Map<java.lang.String,java.util.List<java.lang.Integer>>	getDeviceToMeasurementIndexesMap()
OrderByParameter	getMergeOrderParameter()
java.util.List<java.lang.String>	getOutputColumnNames()
int	hashCode()
protected void	serializeAttributes(java.io.DataOutputStream stream)
protected void	serializeAttributes(java.nio.ByteBuffer byteBuffer)
java.lang.String	toString()

Methods inherited from class org.apache.iotdb.db.mpp.plan.planner.plan.node.process.MultiChildNode

setChildren

Methods inherited from class org.apache.iotdb.db.mpp.plan.planner.plan.node.PlanNode

cloneWithChildren, getPlanNodeId, serialize, serialize, serializeToByteBuffer, setPlanNodeId

Methods inherited from class java.lang.Object

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

Constructor Detail

DeviceViewNode

public DeviceViewNode(PlanNodeId id,
                      OrderByParameter mergeOrderParameter,
                      java.util.List<java.lang.String> outputColumnNames,
                      java.util.Map<java.lang.String,java.util.List<java.lang.Integer>> deviceToMeasurementIndexesMap)

DeviceViewNode

public DeviceViewNode(PlanNodeId id,
                      OrderByParameter mergeOrderParameter,
                      java.util.List<java.lang.String> outputColumnNames,
                      java.util.List<java.lang.String> devices,
                      java.util.Map<java.lang.String,java.util.List<java.lang.Integer>> deviceToMeasurementIndexesMap)

Method Detail

addChildDeviceNode

public void addChildDeviceNode(java.lang.String deviceName,
                               PlanNode childNode)

getDevices

public java.util.List<java.lang.String> getDevices()

getDeviceToMeasurementIndexesMap

public java.util.Map<java.lang.String,java.util.List<java.lang.Integer>> getDeviceToMeasurementIndexesMap()

getChildren

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

Specified by:

getChildren in class PlanNode

addChild

public void addChild(PlanNode child)

Specified by:

addChild in class PlanNode

allowedChildCount

public int allowedChildCount()

Specified by:

allowedChildCount in class PlanNode

clone

public PlanNode clone()

Specified by:

clone in class PlanNode

getMergeOrderParameter

public OrderByParameter getMergeOrderParameter()

getOutputColumnNames

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

Specified by:

getOutputColumnNames in class PlanNode

accept

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

Overrides:

accept in class PlanNode

serializeAttributes

protected void serializeAttributes(java.nio.ByteBuffer byteBuffer)

Specified by:

serializeAttributes in class PlanNode

serializeAttributes

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

Specified by:

serializeAttributes in class PlanNode

Throws:

java.io.IOException

deserialize

public static DeviceViewNode deserialize(java.nio.ByteBuffer byteBuffer)

equals

public boolean equals(java.lang.Object o)

Overrides:

equals in class MultiChildNode

hashCode

public int hashCode()

Overrides:

hashCode in class MultiChildNode

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object