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Remark to 6: A plan compilation will fail hard with a helpful exception. For example, this is the case for invalid ExecNodes, inline objects, or DataStream API source's without proper uid(). Once the plan compilation has been successful, we support the plan in the next Flink version.

Remark to 9: We also need to make sure that all sources/sinks define a uid(). Esp. when using DataStreamScanProvider and DataStreamSinkProvider.

General JSON Plan Assumptions

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