Hive 3.1.3 ReExecDriver

run(String) separated the process into two steps. First is compile, second is run.

@Override
  public CommandProcessorResponse run(String command) {
    CommandProcessorResponse r0 = compileAndRespond(command);
    if (r0.getResponseCode() != 0) {
      return r0;
    }
    return run();
  }

Run compiled statement with retry.

@Override
  public CommandProcessorResponse run() {
    executionIndex = 0;
    int maxExecutuions = 1 + coreDriver.getConf().getIntVar(ConfVars.HIVE_QUERY_MAX_REEXECUTION_COUNT);


    while (true) {
      executionIndex++;
      for (IReExecutionPlugin p : plugins) {
        p.beforeExecute(executionIndex, explainReOptimization);
      }
      coreDriver.getContext().setExecutionIndex(executionIndex);
      LOG.info("Execution #{} of query", executionIndex);
      CommandProcessorResponse cpr = coreDriver.run();

      PlanMapper oldPlanMapper = coreDriver.getPlanMapper();
      afterExecute(oldPlanMapper, cpr.getResponseCode() == 0);

      boolean shouldReExecute = explainReOptimization && executionIndex==1;
      shouldReExecute |= cpr.getResponseCode() != 0 && shouldReExecute();

      if (executionIndex >= maxExecutuions || !shouldReExecute) {
        return cpr;
      }
      LOG.info("Preparing to re-execute query");
      prepareToReExecute();
      CommandProcessorResponse compile_resp = coreDriver.compileAndRespond(currentQuery);
      if (compile_resp.failed()) {
        LOG.error("Recompilation of the query failed; this is unexpected.");
        // FIXME: somehow place pointers that re-execution compilation have failed; the query have been successfully compiled before?
        return compile_resp;
      }

      PlanMapper newPlanMapper = coreDriver.getPlanMapper();
      if (!explainReOptimization && !shouldReExecuteAfterCompile(oldPlanMapper, newPlanMapper)) {
        LOG.info("re-running the query would probably not yield better results; returning with last error");
        // FIXME: retain old error; or create a new one?
        return cpr;
      }
    }
  }