LeiRui commented on a change in pull request #262: [IOTDB-144]meta data cache
for query
URL: https://github.com/apache/incubator-iotdb/pull/262#discussion_r306205394
##########
File path:
iotdb/src/main/java/org/apache/iotdb/db/query/reader/resourceRelated/UnseqResourceMergeReader.java
##########
@@ -84,12 +81,12 @@ public UnseqResourceMergeReader(Path seriesPath,
List<TsFileResource> unseqResou
continue;
}
}
- tsFileReader = FileReaderManager.getInstance()
- .get(tsFileResource.getFile().getPath(), false);
metaDataList = tsFileResource.getChunkMetaDatas();
}
// create and add ChunkReader with priority
+ TsFileSequenceReader tsFileReader = FileReaderManager.getInstance()
+ .get(tsFileResource.getFile().getPath(), tsFileResource.isClosed());
ChunkLoaderImpl chunkLoader = new ChunkLoaderImpl(tsFileReader);
for (ChunkMetaData chunkMetaData : metaDataList) {
Review comment:
If metaDataList size equals 0, then the creation of TsFileSequenceReader can
be skipped.
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