clintropolis commented on a change in pull request #11014:
URL: https://github.com/apache/druid/pull/11014#discussion_r607363683
##########
File path: docs/configuration/index.md
##########
@@ -1675,6 +1675,7 @@ The Druid SQL server is configured through the following
properties on the Broke
|`druid.sql.planner.maxTopNLimit`|Maximum threshold for a [TopN
query](../querying/topnquery.md). Higher limits will be planned as [GroupBy
queries](../querying/groupbyquery.md) instead.|100000|
|`druid.sql.planner.metadataRefreshPeriod`|Throttle for metadata
refreshes.|PT1M|
|`druid.sql.planner.useApproximateCountDistinct`|Whether to use an approximate
cardinality algorithm for `COUNT(DISTINCT foo)`.|true|
+|`druid.sql.planner.useGroupingSetForExactDistinct`|Only relevant when
`useApproximateCountDistinct` is disabled. If set to true, exact distinct
queries are re-written using grouping sets. Otherwise, exact distinct queries
are re-written using joins. This should be set to true for group by query with
multiple exact distinct aggregations. This flag can be overridden per
query.|false|
Review comment:
I think it would be ok if we could leave off by default for next
release, and maybe consider turning on in the release after
--
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:
[email protected]
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
