317brian commented on code in PR #16681: URL: https://github.com/apache/druid/pull/16681#discussion_r1796112820
########## docs/multi-stage-query/known-issues.md: ########## @@ -68,3 +68,15 @@ properties, and the `indexSpec` [`tuningConfig`](../ingestion/ingestion-spec.md# - The maximum number of elements in a window cannot exceed a value of 100,000. - To avoid `leafOperators` in MSQ engine, window functions have an extra scan stage after the window stage for cases where native engine has a non-empty `leafOperator`. + +## Automatic compaction + +<!--This list also exists in data-management/automatic-compaction--> + +The following known issues and limitations affect automatic compaction with the MSQ task engine: + +- The `metricSpec` field is only supported for idempotent aggregators. For more information, see [Idempotent aggregators](../data-management/automatic-compaction.md#supported-aggregators). +- Only dynamic and range-based partitioning are supported +- Set `rollup` to `true` if and only if `metricSpec` is not empty or null. +- You can only partition on string dimensions. However, multi-valued string dimensions are not supported. +- The `maxTotalRows` config is not supported in `DynamicPartitionsSpec`. Use `maxRowsPerSegment` instead. Review Comment: ```suggestion - The `maxTotalRows` config is not supported in `DynamicPartitionsSpec`. Use `maxRowsPerSegment` instead. - Segments can only be sorted on `__time` as the first column. ``` -- 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: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
