| 类型: | bool | 
| 默认: | off | 
| 上下文: | user | 
| 重新开始: | false | 
一个只读的 SQL 事务不能修改非临时表。这个参数控制每个新事务的默认只读状态 。默认是off(读/写)。
更多信息请参考sql-set-transaction。
建议 [EN]
                  This setting is mainly useful for preventing yourself from accidentally changing data.  It is not really a security setting, as anyone can revoke it on their own session.  Better set on a session or ROLE level.  Will show up as TRUE if you are on a replication standby.                
                
                
              