palanieppan-m commented on issue #8728: Initial join support URL: https://github.com/apache/incubator-druid/issues/8728#issuecomment-551957897 @kstrempel we looked into join support through presto couple years ago. Its possible but presto connector interface did not have API to push down predicates. So Druid would have to forward raw non aggregated data to presto and presto would do all query processing, which compromises all the performance benefits of Druid. Great to see this initiative.
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