A table can add calculate column by the self after the dataset is loaded and a DAX formula is specified for it so that it knows what to add as a values in the column. It will happen for every refresh but external data like config file cannot trigger it.
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@pranit828 Thanks, actualy the external config means data from files or other source. it's just data. the action is drived by specific data's change when refresh. for example: when a number in source table changed from 1 to 2 , and after refreshed, the table in PBI will automantic add column . looks it is impossible.