[jira] [Created] (IOTDB-2102) Push limit operator down to each reader

["Yuan Tian (Jira)" <ji...@apache.org>]

Yuan Tian created IOTDB-2102:
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             Summary: Push limit operator down to each reader
                 Key: IOTDB-2102
                 URL: https://issues.apache.org/jira/browse/IOTDB-2102
             Project: Apache IoTDB
          Issue Type: Improvement
          Components: Core/Query
            Reporter: Yuan Tian
            Assignee: Alima777


Currently, limit operator only take effect in main thread of raw query without value filter which is responsible for contructing data set. When the main thread find the current row records has already exceed the limit number, it will return the result set to client and then exit. However, the each reader is running in another async threads, we may continue reading data until the blcoking queue is full.

So, we need to pass the limit parameter to each reader, and if the reader find that it already return enough data, it will stop reading and exit.



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