Package org.apache.iotdb.db.utils

Class QueryUtils

java.lang.Object

org.apache.iotdb.db.utils.QueryUtils

public class QueryUtils
extends java.lang.Object

Method Summary

Modifier and Type	Method	Description
static void	fillOrderIndexes(QueryDataSource dataSource, java.lang.String deviceId, boolean ascending)
static void	filterQueryDataSource(QueryDataSource queryDataSource, TsFileFilter fileFilter)
static ValueIterator	generateValueIterator(java.lang.Object[] values)
static void	modifyAlignedChunkMetaData(java.util.List<org.apache.iotdb.tsfile.file.metadata.AlignedChunkMetadata> chunkMetaData, java.util.List<java.util.List<Modification>> modifications)
static void	modifyChunkMetaData(java.util.List<? extends org.apache.iotdb.tsfile.file.metadata.IChunkMetadata> chunkMetaData, java.util.List<Modification> modifications)	modifyChunkMetaData iterates the chunkMetaData and applies all available modifications on it to generate a ModifiedChunkMetadata.

Methods inherited from class java.lang.Object

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

Method Detail

modifyChunkMetaData

public static void modifyChunkMetaData(java.util.List<? extends org.apache.iotdb.tsfile.file.metadata.IChunkMetadata> chunkMetaData,
                                       java.util.List<Modification> modifications)

modifyChunkMetaData iterates the chunkMetaData and applies all available modifications on it to generate a ModifiedChunkMetadata.
the caller should guarantee that chunkMetaData and modifications refer to the same time series paths.

Parameters:

chunkMetaData - the original chunkMetaData.

modifications - all possible modifications.

modifyAlignedChunkMetaData

public static void modifyAlignedChunkMetaData(java.util.List<org.apache.iotdb.tsfile.file.metadata.AlignedChunkMetadata> chunkMetaData,
                                              java.util.List<java.util.List<Modification>> modifications)

filterQueryDataSource

public static void filterQueryDataSource(QueryDataSource queryDataSource,
                                         TsFileFilter fileFilter)

generateValueIterator

public static ValueIterator generateValueIterator(java.lang.Object[] values)

fillOrderIndexes

public static void fillOrderIndexes(QueryDataSource dataSource,
                                    java.lang.String deviceId,
                                    boolean ascending)