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Posted to commits@druid.apache.org by GitBox <gi...@apache.org> on 2021/06/23 11:24:06 UTC

[GitHub] [druid] clintropolis commented on pull request #11379: improve groupBy query granularity translation with 5x query performance improve when issued from sql layer

clintropolis commented on pull request #11379:
URL: https://github.com/apache/druid/pull/11379#issuecomment-866754269


   it would probably also be worth measuring the code prior to this change using the query context parameter `vectorizeVirtualColumns` set to `true` (it is off by default currently, though this might soon change) so that the original query with all granularity can use the vectorized group by engine and expression processing.
   
   That said, using granularity instead of expressions very well could still be faster, even if they can use the vectorized engine.


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