weijietong opened a new issue #6457: Support Join URL: https://github.com/apache/incubator-druid/issues/6457 This issue is to make Druid have the join ability. The main logic is to create a join index to represent the join relationship between joint tables. The joint tables should have the same number of shards which are generated according to their joint key,and stayed together. At Alipay, we achieved great query performance thorough this way. The related PRs will be split into several small parts: join sql translation , joint index segment generation, joint table schedule. It may take me some time to refactor my codes to adjust the community master code base.
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