[GitHub] [druid] clintropolis commented on pull request #13977: smarter nested column index utilization

["clintropolis (via GitHub)" <gi...@apache.org>]

clintropolis commented on PR #13977:
URL: https://github.com/apache/druid/pull/13977#issuecomment-1483742354

   I decided to do the `DruidPredicateIndex` threshold based on the overall value cardinality instead of evaluating each predicate on the assumption that the predicates themselves are not that cheap. However, there might be room for exploration of evaluating the predicates under a certain dictionary sizes to determine the actual number of bitmap operations like we are doing for range indexes (well the `LexicographicalRangeIndex` for strings has a predicate form that further reduces the actual number of bitmaps, but that they operate on the full range before the predicate).


-- 
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.

To unsubscribe, e-mail: commits-unsubscribe@druid.apache.org

For queries about this service, please contact Infrastructure at:
users@infra.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: commits-unsubscribe@druid.apache.org
For additional commands, e-mail: commits-help@druid.apache.org