[GitHub] [druid] gianm edited a comment on issue #9791: Introduce extensibility support for Datasources

[GitBox <gi...@apache.org>]

gianm edited a comment on issue #9791:
URL: https://github.com/apache/druid/issues/9791#issuecomment-621611255


   Is the idea that MultiDataSource would be something that exists and runs on the Broker, or on Historicals, or both?
   
   This seems sort of similar to the `SegmentWrangler` interface, which is used by the Broker in LocalQuerySegmentWalker to do direct queries over inline and lookup datasources. I wonder if these can be combined? What do you think?
   
   If not, then I wonder if this thing you're trying to do could be done in a style similar to SegmentWrangler? (Check out its SegmentWranglerModule, etc.)
   
   Are there use cases you have in mind other than redesigning UnionDataSource?


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