Commits on Dec 8, 2020

1. fix: transaction retry could fail if tx contained failed statements …

   Transaction retries in the Connection API / JDBC driver could fail if the following happened:
   1. The initial transaction contains a statement that returns an error that does not invalidate
      the transaction, such as for example a "Table not found" error, and that error is caught and
      handled by the application code.
   2. The retry attempt tries to execute the failed statement to verify that the statement still
      returns the same error. If however the transaction that is used by the retry has been aborted
      immediately before the execution of this statement, the statement will now return Aborted
      instead of the original error. That would be seen as a different error than the initial
      error and would fail the retry attempt.
   
   When the above happens, the Aborted error in the retry should be propagated and the retry
   attempt should be restarted.
   
   Fixes #685

   

   olavloite committed Dec 8, 2020
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