When you delete a reference table object from the Model repository, the table data remains in the reference data warehouse.
Purge Orphaned Tables
option on the Content Management Service to delete unused reference tables. The option identifies the tables that store data for reference table objects in the Model repository and deletes all other reference tables from the warehouse. The purge option removes obsolete reference tables and creates additional space in the warehouse.
Before you purge the unused tables, verify the following prerequisites:
You have the Manage Service privilege on the domain.
The user name that the Content Management Service uses to communicate with the Model repository has the Administrator role on the associated Model Repository Service.
All Data Integration Services associated with the Model repository are available.
There are no data operations in progress on the reference data warehouse.
The reference data warehouse stores data for the reference table objects in a single Model repository.
The purge operation reads the Model repository that the current Content Management Service identifies, and it deletes any reference table that the Model repository does not use. If the reference data warehouse stores reference data for any other Model repository, the purge operation deletes all tables that belong to the other repository.
To prevent accidental data loss, the purge operation does not delete tables if the Model repository does not contain a reference table object.