org.apache.iotdb.db.metadata.path

类 MeasurementPath

java.lang.Object

org.apache.iotdb.tsfile.read.common.Path

org.apache.iotdb.db.metadata.path.PartialPath

org.apache.iotdb.db.metadata.path.MeasurementPath

所有已实现的接口:

Serializable, Cloneable, Comparable<Path>

public class MeasurementPath
extends PartialPath

另请参阅:

序列化表格

字段概要

从类继承的字段 org.apache.iotdb.db.metadata.path.PartialPath

nodes

从类继承的字段 org.apache.iotdb.tsfile.read.common.Path

device, fullPath

构造器概要

构造器

构造器和说明
MeasurementPath()
MeasurementPath(PartialPath measurementPath, IMeasurementSchema measurementSchema)
MeasurementPath(String measurementPath)
MeasurementPath(String device, String measurement, IMeasurementSchema measurementSchema)
MeasurementPath(String measurementPath, TSDataType type)

方法概要

限定符和类型	方法和说明
MeasurementPath	clone()
PartialPath	copy()
LastPointReader	createLastPointReader(TSDataType dataType, Set<String> deviceMeasurements, QueryContext context, QueryDataSource dataSource, long queryTime, Filter timeFilter)
SeriesReader	createSeriesReader(Set<String> allSensors, TSDataType dataType, QueryContext context, List<TsFileResource> seqFileResource, List<TsFileResource> unseqFileResource, Filter timeFilter, Filter valueFilter, boolean ascending)
SeriesReader	createSeriesReader(Set<String> allSensors, TSDataType dataType, QueryContext context, QueryDataSource dataSource, Filter timeFilter, Filter valueFilter, TsFileFilter fileFilter, boolean ascending)
TsFileResource	createTsFileResource(List<ReadOnlyMemChunk> readOnlyMemChunk, List<IChunkMetadata> chunkMetadataList, TsFileResource originTsFileResource)
ITimeSeriesMetadata	generateTimeSeriesMetadata(List<ReadOnlyMemChunk> readOnlyMemChunk, List<IChunkMetadata> chunkMetadataList) Because the unclosed tsfile don't have TimeSeriesMetadata and memtables in the memory don't have chunkMetadata, but query will use these, so we need to generate it for them.
String	getFullPathWithAlias()
String	getMeasurementAlias()
IMeasurementSchema	getMeasurementSchema()
ReadOnlyMemChunk	getReadOnlyMemChunkFromMemTable(IMemTable memTable, List<Pair<Modification,IMemTable>> modsToMemtable, long timeLowerBound) get the ReadOnlyMemChunk from the given MemTable.
TSDataType	getSeriesType()
byte	getSeriesTypeInByte()
List<IChunkMetadata>	getVisibleMetadataListFromWriter(RestorableTsFileIOWriter writer, TsFileResource tsFileResource, QueryContext context)
boolean	isMeasurementAliasExists()
boolean	isUnderAlignedEntity()
void	setMeasurementAlias(String measurementAlias)
void	setMeasurementSchema(IMeasurementSchema measurementSchema)
void	setUnderAlignedEntity(boolean underAlignedEntity)
PartialPath	transformToExactPath() if isUnderAlignedEntity is true, return an AlignedPath with only one sub sensor otherwise, return itself

从类继承的方法 org.apache.iotdb.db.metadata.path.PartialPath

alterPrefixPath, compareTo, concatNode, concatPath, concatPath, equals, equals, fromStringList, getDevice, getDevicePath, getFirstNode, getFullPath, getMeasurement, getModificationsForMemtable, getNodeLength, getNodes, getTailNode, hashCode, matchFullPath, matchPrefixPath, startsWith, toString, toStringList, toTSFilePath

从类继承的方法 org.apache.iotdb.tsfile.read.common.Path

getColumnNum, setMeasurement

从类继承的方法 java.lang.Object

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

构造器详细资料

MeasurementPath

public MeasurementPath()

MeasurementPath

public MeasurementPath(String measurementPath)
                throws IllegalPathException

抛出:

IllegalPathException

MeasurementPath

public MeasurementPath(String measurementPath,
                       TSDataType type)
                throws IllegalPathException

抛出:

IllegalPathException

MeasurementPath

public MeasurementPath(PartialPath measurementPath,
                       IMeasurementSchema measurementSchema)

MeasurementPath

public MeasurementPath(String device,
                       String measurement,
                       IMeasurementSchema measurementSchema)
                throws IllegalPathException

抛出:

IllegalPathException

方法详细资料

getMeasurementSchema

public IMeasurementSchema getMeasurementSchema()

覆盖:

getMeasurementSchema 在类中 PartialPath

getSeriesType

public TSDataType getSeriesType()

覆盖:

getSeriesType 在类中 PartialPath

getSeriesTypeInByte

public byte getSeriesTypeInByte()

setMeasurementSchema

public void setMeasurementSchema(IMeasurementSchema measurementSchema)

getMeasurementAlias

public String getMeasurementAlias()

覆盖:

getMeasurementAlias 在类中 PartialPath

setMeasurementAlias

public void setMeasurementAlias(String measurementAlias)

覆盖:

setMeasurementAlias 在类中 PartialPath

isMeasurementAliasExists

public boolean isMeasurementAliasExists()

覆盖:

isMeasurementAliasExists 在类中 PartialPath

getFullPathWithAlias

public String getFullPathWithAlias()

覆盖:

getFullPathWithAlias 在类中 PartialPath

isUnderAlignedEntity

public boolean isUnderAlignedEntity()

setUnderAlignedEntity

public void setUnderAlignedEntity(boolean underAlignedEntity)

copy

public PartialPath copy()

覆盖:

copy 在类中 PartialPath

transformToExactPath

public PartialPath transformToExactPath()

if isUnderAlignedEntity is true, return an AlignedPath with only one sub sensor otherwise, return itself

createLastPointReader

public LastPointReader createLastPointReader(TSDataType dataType,
                                             Set<String> deviceMeasurements,
                                             QueryContext context,
                                             QueryDataSource dataSource,
                                             long queryTime,
                                             Filter timeFilter)

覆盖:

createLastPointReader 在类中 PartialPath

createSeriesReader

public SeriesReader createSeriesReader(Set<String> allSensors,
                                       TSDataType dataType,
                                       QueryContext context,
                                       QueryDataSource dataSource,
                                       Filter timeFilter,
                                       Filter valueFilter,
                                       TsFileFilter fileFilter,
                                       boolean ascending)

覆盖:

createSeriesReader 在类中 PartialPath

createSeriesReader

public SeriesReader createSeriesReader(Set<String> allSensors,
                                       TSDataType dataType,
                                       QueryContext context,
                                       List<TsFileResource> seqFileResource,
                                       List<TsFileResource> unseqFileResource,
                                       Filter timeFilter,
                                       Filter valueFilter,
                                       boolean ascending)

覆盖:

createSeriesReader 在类中 PartialPath

createTsFileResource

public TsFileResource createTsFileResource(List<ReadOnlyMemChunk> readOnlyMemChunk,
                                           List<IChunkMetadata> chunkMetadataList,
                                           TsFileResource originTsFileResource)
                                    throws IOException

覆盖:

createTsFileResource 在类中 PartialPath

抛出:

IOException

generateTimeSeriesMetadata

public ITimeSeriesMetadata generateTimeSeriesMetadata(List<ReadOnlyMemChunk> readOnlyMemChunk,
                                                      List<IChunkMetadata> chunkMetadataList)
                                               throws IOException

Because the unclosed tsfile don't have TimeSeriesMetadata and memtables in the memory don't have chunkMetadata, but query will use these, so we need to generate it for them.

覆盖:

generateTimeSeriesMetadata 在类中 PartialPath

抛出:

IOException

getReadOnlyMemChunkFromMemTable

public ReadOnlyMemChunk getReadOnlyMemChunkFromMemTable(IMemTable memTable,
                                                        List<Pair<Modification,IMemTable>> modsToMemtable,
                                                        long timeLowerBound)
                                                 throws QueryProcessException,
                                                        IOException

从类复制的说明: PartialPath

get the ReadOnlyMemChunk from the given MemTable.

覆盖:

getReadOnlyMemChunkFromMemTable 在类中 PartialPath

返回:

ReadOnlyMemChunk

抛出:

QueryProcessException

IOException

clone

public MeasurementPath clone()

覆盖:

clone 在类中 PartialPath

getVisibleMetadataListFromWriter

public List<IChunkMetadata> getVisibleMetadataListFromWriter(RestorableTsFileIOWriter writer,
                                                             TsFileResource tsFileResource,
                                                             QueryContext context)

覆盖:

getVisibleMetadataListFromWriter 在类中 PartialPath