In both cases the table and its data have to be rebuilt and will be removed from admin panel.

*If the table structure has changed it will be updated (add/change/delete fields). Existing data will be retained (custom field names, filters, field types, select values, ...)

**If the table structure has changed it will be updated (add/change/delete fields). Existing data will be reset (custom field names, filters, field types, select values, ...)