[GitHub] [druid] gianm commented on issue #10221: Select from union subquery fails due to column order

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

gianm commented on issue #10221:
URL: https://github.com/apache/druid/issues/10221#issuecomment-786030055


   @borasy To do that query, I think we'd want to extend the native "union" datasource (https://druid.apache.org/docs/latest/querying/datasource.html#union) to be able to accept "table" or "query" children instead of just "table". Then, the SQL layer could plan your query into a native "union" datasource on top of "query" children.


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