void showWarnings() {
    try {
      if (getDatabaseConnection().getConnection() == null
          || !getOpts().getVerbose()) {
        return;
      }
      showWarnings(getDatabaseConnection().getConnection().getWarnings());
    } catch (Exception e) {
      handleException(e);
    }
  }
Print out any warnings that exist for the current connection.
beeline/src/java/org/apache/hive/beeline/BeeLine.java