gianm commented on issue #8661: Druid SQL - natively support mathematical functions ROUND(), RADIANS(), EXP(), LN(), POWER(), RAND() URL: https://github.com/apache/incubator-druid/issues/8661#issuecomment-548066861 Hi @ntkawasaki, Druid does support all of those functions today except `RAND`. Most of them were added in version 0.15. (You can access old Druid docs at e.g. https://druid.apache.org/docs/0.14.0-incubating/querying/sql; note that the 0.14 docs don't include most of these functions.) I raised an issue specifically for `RAND`: https://github.com/apache/incubator-druid/issues/8789, which is still missing today. Btw, we deprecated and removed `useFallback` because it led to unscalable query plans in many cases. We found that often, queries with `useFallback` would pull all raw data into the Druid Broker and process it there, which was a bad approach for big datasets. This risk outweighed the benefits, and so we decided to implement more functionality in Druid's native query system instead of relying on SQL interpreter fallback.
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