Not sure if this helps but I was able to find the following:
http://www.freepatentsonline.com/y2018/0322127.html
"In the table-per-class scheme, sys_storage_alias maps logical elements to storage aliases on an actual RDBMS table. Likewise, sys_storage_table_alias maps logical table names to storage table names. In one implementation of a table-per-partition approach, sys_storage_alias may still be used to map logical elements to a storage alias, but may include a new field, e.g., storage_table_names, used to specify which partition hosts the storage alias. In certain implementations, however, synchronized fields on multiple or all partitions may not need such a reference."
