org.apache.iotdb.db.utils

类 SchemaUtils

java.lang.Object

org.apache.iotdb.db.utils.SchemaUtils

public class SchemaUtils
extends Object

方法概要

限定符和类型	方法和说明
static void	cacheTimeseriesSchema(TimeseriesSchema schema)
static void	checkDataTypeWithEncoding(TSDataType dataType, TSEncoding encoding)
static Throwable	findMetaMissingException(Throwable currEx) If e or one of its recursive causes is a PathNotExistException or StorageGroupNotSetException, return such an exception or null if it cannot be found.
static List<TSDataType>	getAggregatedDataTypes(List<TSDataType> measurementDataType, String aggregation) If the datatype of 'aggregation' depends on 'measurementDataType' (min_value, max_value), return 'measurementDataType' directly, or return a list whose elements are all the datatype of 'aggregation' and its length is the same as 'measurementDataType'.
static TSDataType	getAggregationType(String aggregation)
static TSDataType	getSeriesTypeByPath(MeasurementPath path, String aggregation)
static List<TSDataType>	getSeriesTypesByPaths(Collection<? extends PartialPath> paths)
static List<TSDataType>	getSeriesTypesByPaths(List<MeasurementPath> paths, List<String> aggregations)
static void	registerTimeseries(TimeseriesSchema schema)

从类继承的方法 java.lang.Object

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

方法详细资料

registerTimeseries

public static void registerTimeseries(TimeseriesSchema schema)

cacheTimeseriesSchema

public static void cacheTimeseriesSchema(TimeseriesSchema schema)

getSeriesTypesByPaths

public static List<TSDataType> getSeriesTypesByPaths(Collection<? extends PartialPath> paths)

getAggregatedDataTypes

public static List<TSDataType> getAggregatedDataTypes(List<TSDataType> measurementDataType,
                                                      String aggregation)

If the datatype of 'aggregation' depends on 'measurementDataType' (min_value, max_value), return 'measurementDataType' directly, or return a list whose elements are all the datatype of 'aggregation' and its length is the same as 'measurementDataType'.

参数:

measurementDataType -

aggregation -

返回:

getSeriesTypesByPaths

public static List<TSDataType> getSeriesTypesByPaths(List<MeasurementPath> paths,
                                                     List<String> aggregations)

getSeriesTypeByPath

public static TSDataType getSeriesTypeByPath(MeasurementPath path,
                                             String aggregation)

getAggregationType

public static TSDataType getAggregationType(String aggregation)

参数:

aggregation - aggregation function

返回:

the data type of the aggregation or null if it aggregation is null

findMetaMissingException

public static Throwable findMetaMissingException(Throwable currEx)

If e or one of its recursive causes is a PathNotExistException or StorageGroupNotSetException, return such an exception or null if it cannot be found.

参数:

currEx -

返回:

null or a PathNotExistException or a StorageGroupNotSetException

checkDataTypeWithEncoding

public static void checkDataTypeWithEncoding(TSDataType dataType,
                                             TSEncoding encoding)
                                      throws MetadataException

抛出:

MetadataException