How to deal with the existing rows data update and delete case

[cw1427]

As per the logic mentioned in the README, it just deals with the data increasing case. How to deal with the existing rows data update case and delete case?

[greggles]

This seems like a feature request to deal with that use case, but it seems like a big change that might not be well suited to this tool. Perhaps this limitation should be mentioned in the README.

A workaround would be to delete the table in bigquery and migrate the data entirely, though that obviously doesn't work well for large amounts of data.

This problem might be best solved with a solution based on change data capture which is its own world of tools/solutions.