[GitHub] [iotdb] haimeiguo opened a new issue #2600: Improve GROUP BY TIME when endtime - starttime < interval

[GitBox <gi...@apache.org>]

haimeiguo opened a new issue #2600:
URL: https://github.com/apache/iotdb/issues/2600


   When use GROUP BY TIME if endtime - starttime < interval currently the row result is rounding down, showing 1 row less.
   
   now
   (endtime - starttime) / interval = 5.3 -> 5 rows, currently we will show 5 rows of result. it rounds down
   
   want 
   (endtime - starttime) / interval = 5.3 -> 6 rows, show 6 rows of result. it rounds up. 
   
   e.g., select avg(*) from root group by ( [now() -1h, now()), 7200s) will return 1 row


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