code: def DbMySqlSelect(self, argin):
          
          self._log.debug("In DbMySqlSelect()")
          tmp_argin = argin.lower()
  
          #  Check if SELECT key is alread inside command
  
          cmd = argin
          tmp_argin = argin.lower()
          pos = tmp_argin.find('select')
          if pos == -1:
              cmd = "SELECT " + cmd
  
          pos = tmp_argin.find(';')
          if pos != -1 and len(tmp_argin) > (pos + 1):
              th_exc(DB_IncorrectArguments,
                     "SQL command not valid: " + argin,
                     "DataBase::ExportDevice()")
          return self.db.my_sql_select(cmd)
docs: This is a very low level command.
          It executes the specified  SELECT command on TANGO database and returns its result without filter.
  
          :param argin: MySql Select command
          :type: tango.DevString
          :return: MySql Select command result
           - svalues : select results
           - lvalue[n] : =0 if svalue[n] is null else =1
           (last lvalue -1) is number of rows, (last lvalue) is number of fields
          :rtype: tango.DevVarLongStringArray