clintropolis commented on issue #9484: Harmonization and bug-fixing for selector and filter behavior on unknown types. URL: https://github.com/apache/druid/pull/9484#issuecomment-597053167 Tagged release notes because this PR changes the behavior of complex metric aggregation at ingestion time when SQL compatible null handling is _disabled_ (the default mode) to now aggregate the default 0 values for rows instead of skipping them. This change is for the better imo since it makes things symmetrical to as if you ingested the raw data and built the sketch at query time, but it is different so worth calling out.
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