】 启动事件处理(read events) 【启动VFP的事件处理程序。 语法: READ EVENTS 备注: 当该命令执行后,系统即停止继续执行后续的语句,这...
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Mark all events as read 将所有事件标记为已读
For example, duplicate read events would be removed.
例如,应该消除重复的读取事件。
Therefore, read events that request data already stored in memory don't generate a trip to the hard disk.
因此,请求存储在内存中的数据的读事件不会访问硬盘。
This event could be tied to a sensor event, or it could be a derived event generated after an elapsed period of time in which no tag read events occur.
此事件可以绑定到传感器事件,也可以绑定到没有标签读取事件发生的一段时间后生成的派生事件。
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