[jira] [Created] (IOTDB-1394) Time series statistics API for UDTF

[Steve Yurong Su (Jira)]

Steve Yurong Su created IOTDB-1394:
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             Summary: Time series statistics API for UDTF
                 Key: IOTDB-1394
                 URL: https://issues.apache.org/jira/browse/IOTDB-1394
             Project: Apache IoTDB
          Issue Type: Sub-task
            Reporter: Steve Yurong Su


In the eval process of many UDTFs, the statistical information (avg, max, min, 
count ...) of the time series needs to be known in advance.



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