code: def jobIncrementIntField(self, jobID, fieldName, increment=1,
                             useConnectionID=False):
      
      # Get the private field name and string form of the value
      dbFieldName = self._jobs.pubToDBNameDict[fieldName]
  
      # Get a database connection and cursor
      with ConnectionFactory.get() as conn:
        query = 'UPDATE %s SET %s=%s+%%s ' \
                '          WHERE job_id=%%s' \
                % (self.jobsTableName, dbFieldName, dbFieldName)
        sqlParams = [increment, jobID]
  
        if useConnectionID:
          query += ' AND _eng_cjm_conn_id=%s'
          sqlParams.append(self._connectionID)
  
        result = conn.cursor.execute(query, sqlParams)
  
      if result != 1:
        raise RuntimeError(
          "Tried to increment the field (%r) of jobID=%s (conn_id=%r), but an " \
          "error occurred. result=%r; query=%r" % (
            dbFieldName, jobID, self._connectionID, result, query))
docs: Incremet the value of 1 field in a job by increment. The 'fieldName' is
      the public name of the field (camelBack, not the lower_case_only form as
      stored in the DB).
  
      This method is used for example by HypersearcWorkers to update the
      engWorkerState field periodically. By qualifying on curValue, it insures
      that only 1 worker at a time is elected to perform the next scheduled
      periodic sweep of the models.
  
      Parameters:
      ----------------------------------------------------------------
      jobID:        jobID of the job record to modify
      fieldName:    public field name of the field
      increment:    increment is added to the current value of the field