Am I missing something here? This sounds alot like IMS.
Hierarchical databases have been around for a long, long time. The concepts look similar to some ancient legacy system that I worked on a decade ago. Doesn't sound incredibly novel.
Their goal with the hieararchy is to create "table groups", ie. [regions of] groups of tables that stick together in terms of _sharding_, achieved by looking at the primary key (PK) of the root table in their case, which if you notice is shared by all its descendants.
Hierarchical databases have been around for a long, long time. The concepts look similar to some ancient legacy system that I worked on a decade ago. Doesn't sound incredibly novel.