[jira] [Created] (IOTDB-2582) Enable reading chunk by timestamp

["周沛辰 (Jira)" <ji...@apache.org>]

周沛辰 created IOTDB-2582:
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             Summary: Enable reading chunk by timestamp
                 Key: IOTDB-2582
                 URL: https://issues.apache.org/jira/browse/IOTDB-2582
             Project: Apache IoTDB
          Issue Type: Improvement
            Reporter: 周沛辰
            Assignee: 周沛辰
             Fix For: 0.13.0


Currently, we use ChunkReaderByTimestamp  by calling its contructor and then setting the {{{}currentTimestamp, which makes the class invalid and does not accelerate queries{}}}.

 

*To Reproduce*
Steps to reproduce the behavior:
 # Import {{org.apache.iotdb.tsfile.read.reader.chunk.ChunkReaderByTimestamp}} and its super class {{{}org.apache.iotdb.tsfile.read.reader.chunk.ChunkReader{}}}.
 # Read or build one Chunk with a few data
 # Construct a ChunkReader, a ChunkReaderByTimestamp, and set the {{currentTimestamp}} of the latter one with interface {{public void setCurrentTimestamp(long currentTimestamp)}}
 # Run with debugger and watch the member variable {{private List<IPageReader> pageReaderList}} of these two instances. They are always the same.
 # Or fetch data by {{while (reader.hasNextSatisfiedPage()) \{BatchData batchData = reader.nextPageData()}}} and print all points. They are always the same, too.

 

*Solution*

Therefore, we remove the ChunkReaderByTimestamp , instead, we add a constructor in ChunkReader to implement reading chunk by timestamp, which is
{quote}public ChunkReader(Chunk chunk, Filter filter, long currentTimestamp)
{quote}
 So does AlignedChunkReaderByTimestamp.

 

 



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