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Posted to commits@pinot.apache.org by GitBox <gi...@apache.org> on 2022/06/28 20:32:03 UTC
[GitHub] [pinot] navina opened a new issue, #8983: Support all additive functions with rollup
navina opened a new issue, #8983:
URL: https://github.com/apache/pinot/issues/8983
As of today, only `sum`, `max` and `min` are supported in the `RealtimeToOfflineSegmentsTask`. We should be able to support all additive functions during rollup (eg. `percentile` etc)
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[GitHub] [pinot] Jackie-Jiang commented on issue #8983: Support all additive functions with rollup
Posted by GitBox <gi...@apache.org>.
Jackie-Jiang commented on issue #8983:
URL: https://github.com/apache/pinot/issues/8983#issuecomment-1171167607
The challenge here is that the intermediate result (e.g. `list` for `percentile`) must be of the same type of the input. In order to support any aggregation function, we need to figure out a way to store the intermediate result as a separate column (similar to star-tree). The query engine needs to smartly choose the intermediate result column to aggregate on. We also need to decide what value to put in the original column (or not allow querying it directly).
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