Beam devs - I'm looking for review on https://github.com/apache/beam/pull/8945 which builds on a previous PR by Wout Sheepers that was never merged due to concerns over evolving the coder for TableDestination.
The new PR defaults to the existing TableDestinationCoderV2 and ensures the new TableDestinationCoderV3 is used only when the user has opted in by calling a clustering-related method. As far as I can tell, clustered tables are a substantial improvement over non-clustered tables in BigQuery with few downsides, so I expect substantial interest in populating clustered tables now that the feature is GA.
