You are viewing a plain text version of this content. The canonical link for it is here.

Posted to dev@doris.apache.org by GitBox <gi...@apache.org> on 2019/07/16 03:24:00 UTC

[GitHub] [incubator-doris] kangkaisen opened a new issue #1485: Add a Bitmap count distinct UDAF

kangkaisen opened a new issue #1485: Add a Bitmap count distinct UDAF
URL: https://github.com/apache/incubator-doris/issues/1485
 
 
   Add a Bitmap count distinct UDAF base on RoaringBitmap.
   After simple test, **I find the bitmap count distinct is 2x~3x faster than default count distinct in some case**.
   
   The constraint for this bitmap UDAF:
   only support bool, tiny int, small int, , int.
   
   

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
users@infra.apache.org


With regards,
Apache Git Services

---------------------------------------------------------------------
To unsubscribe, e-mail: dev-unsubscribe@doris.apache.org
For additional commands, e-mail: dev-help@doris.apache.org