THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
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Locations where `TableSource`s are exposed such as `fromTableSource()` are already deprecated or will be deprecated. It is recommended that users use the `connect()` API or DDL.
The legacy planner has different internal data structures and limited functionality in general. Therefore, we will not support the new interfaces in the legacy planner.
Test Plan
Unit tests will test the interfaces. Existing connector tests will verify the implementation.
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