if then operation的意思|示意

If the type does not support a given operation, then an object of that type cannot perform that operation.

如果某种类型不支持某种操作，那么这种类型的对象也就不能执行该操作。

If more than one column is aggregated using the same grouping key or without a grouping key, then all the aggregations are computed within the same operation with a single pass over the data.

如果利用相同的分组关键字或者没有分组关键字，来聚合多个列，那么，所有的聚合都在单个数据传递中的相同操作中进行。

If the source object is dropped on a valid drop candidate, the appropriate operation then takes place.

如果源对象被拖放在一个有效的拖放候选位置，适当的操作就会产生。

Security role definition changes: If a module level operation results in changes to application security role definitions, then the entire application may be recycled for any module level changes.

安全角色定义更改：如果模块级别操作导致应用程序安全角色定义更改，则会因为任何模块级别的更改而导致整个应用程序重新启动。

Similarly, if a file in the partial application exists in the deployed application EAR, then it is updated in the deployed EAR as a result of update operation.

类似地，如果部分应用程序中的某个文件存在于已部署的应用程序 EAR 中，则更新操作会在已部署的 EAR 中更新此文件。

The effect of this is that if an event handler implements a request-response operation, then only one instance of such an event handler may be active at any point in time.

此规定的结果是，如果某个事件处理程序实现了一个请求-响应操作，则在任何时间点，只能有一个此类事件处理程序的实例处于活动状态。