Data quality: Default schedule for data metric functions¶

Data metric functions (DMFs) are associated with tables and views to run data quality checks on a regular schedule. This change introduces the concept of a default schedule, and behaves as follows:

Before the change:

您必须修改表或视图来设置计划，才能将 DMF 与该对象关联。没有默认计划。

If you run an ALTER <object> UNSET DATA_METRIC_SCHEDULE command, the DMF schedule is set to an empty string, which suspends all DMF evaluations on the table or view.

After the change:

每个表和视图都有一个默认一小时的计划。要按一小时间隔运行数据质量检查，只需将 DMF 与对象关联即可。您可以随时更改默认值。

If you run an ALTER <object> UNSET DATA_METRIC_SCHEDULE command, the DMF schedule is reset to the default of one hour.

如果要暂停对象关联的所有 DMFs，将计划设置为空字符串即可。

参考：2101