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Tasks covered by yellow shade on DAG differentiate the operators are executed within photon engine
Also, if you clean the plan of your task, it explains well in detail what the operations run in the photon engine and what cannot be executed within it.
Typo error in my second point of the previous post. Click the execution plan of your task[this is available under SQL/Dataframe tab in Spark UI]. It explains what operations run in the photon engine and what didn't execute by photon.
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