Package org.apache.iotdb.db.utils

Class SchemaUtils

  • public class SchemaUtils
extends java.lang.Object

    • Method Summary

      All Methods Static Methods Concrete Methods 
      Modifier and Type Method Description
      static void cacheTimeseriesSchema​(org.apache.iotdb.tsfile.write.schema.TimeseriesSchema schema)  
      static void checkDataTypeWithEncoding​(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType, org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding encoding)  
      static java.lang.Throwable findMetaMissingException​(java.lang.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 java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> getAggregatedDataTypes​(java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> measurementDataType, java.lang.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 org.apache.iotdb.tsfile.file.metadata.enums.TSDataType getAggregationType​(java.lang.String aggregation)  
      static org.apache.iotdb.tsfile.file.metadata.enums.TSDataType getSeriesTypeByPath​(org.apache.iotdb.commons.path.PartialPath path, java.lang.String aggregation)  
      static java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> getSeriesTypesByPaths​(java.util.Collection<? extends org.apache.iotdb.commons.path.PartialPath> paths)  
      static java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> getSeriesTypesByPaths​(java.util.List<MeasurementPath> paths, java.util.List<java.lang.String> aggregations)  
      static boolean isConsistentWithScanOrder​(AggregationType aggregationFunction, Ordering scanOrder)
      judge whether the order of aggregation calculation is consistent with the order of traversing data
      static void registerTimeseries​(org.apache.iotdb.tsfile.write.schema.TimeseriesSchema schema)  
      static java.util.List<AggregationType> splitPartialAggregation​(AggregationType aggregationType)  

      • Methods inherited from class java.lang.Object

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

    • Method Detail

      • registerTimeseries

        public static void registerTimeseries​(org.apache.iotdb.tsfile.write.schema.TimeseriesSchema schema)

      • cacheTimeseriesSchema

        public static void cacheTimeseriesSchema​(org.apache.iotdb.tsfile.write.schema.TimeseriesSchema schema)

      • getSeriesTypesByPaths

        public static java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> getSeriesTypesByPaths​(java.util.Collection<? extends org.apache.iotdb.commons.path.PartialPath> paths)

      • getAggregatedDataTypes

        public static java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> getAggregatedDataTypes​(java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> measurementDataType,
                                                                                                            java.lang.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'.
        Parameters:
        measurementDataType -
        aggregation -
        Returns:

      • getSeriesTypesByPaths

        public static java.util.List<org.apache.iotdb.tsfile.file.metadata.enums.TSDataType> getSeriesTypesByPaths​(java.util.List<MeasurementPath> paths,
                                                                                                           java.util.List<java.lang.String> aggregations)

      • getSeriesTypeByPath

        public static org.apache.iotdb.tsfile.file.metadata.enums.TSDataType getSeriesTypeByPath​(org.apache.iotdb.commons.path.PartialPath path,
                                                                                         java.lang.String aggregation)

      • getAggregationType

        public static org.apache.iotdb.tsfile.file.metadata.enums.TSDataType getAggregationType​(java.lang.String aggregation)
        Parameters:
        aggregation - aggregation function
        Returns:
        the data type of the aggregation or null if it aggregation is null

      • isConsistentWithScanOrder

        public static boolean isConsistentWithScanOrder​(AggregationType aggregationFunction,
                                                Ordering scanOrder)
        judge whether the order of aggregation calculation is consistent with the order of traversing data

      • findMetaMissingException

        public static java.lang.Throwable findMetaMissingException​(java.lang.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.
        Parameters:
        currEx -
        Returns:
        null or a PathNotExistException or a StorageGroupNotSetException

      • checkDataTypeWithEncoding

        public static void checkDataTypeWithEncoding​(org.apache.iotdb.tsfile.file.metadata.enums.TSDataType dataType,
                                             org.apache.iotdb.tsfile.file.metadata.enums.TSEncoding encoding)
                                      throws org.apache.iotdb.commons.exception.MetadataException
        Throws:
        org.apache.iotdb.commons.exception.MetadataException