Zoltan Haindrich 2eac8318f8 Support Union in Decoupled planning (#17354) ... * introduces `UnionQuery` * some changes to enable a `UnionQuery` to have multiple input datasources * `UnionQuery` execution is driven by the `QueryLogic` - which could later enable to reduce some complexity in `ClientQuerySegmentWalker` * to run the subqueries of `UnionQuery` there was a need to access the `conglomerate` from the `Runner`; to enable that some refactors were done * renamed `UnionQueryRunner` to `UnionDataSourceQueryRunner` * `QueryRunnerFactoryConglomerate` have taken the place of `QueryToolChestWarehouse` which shaves of some unnecessary things here and there * small cleanup/refactors		2024-11-05 16:58:57 +01:00
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main/java/org/apache/druid/quidem	Support Union in Decoupled planning (#17354)	2024-11-05 16:58:57 +01:00
test	Add kttm-nested dataset and some usage sessions of it (#16867)	2024-09-26 15:24:23 +05:30