Duration of Fragment-Level Privileges
The duration of fragment-level privileges is tied to the duration of the fragmentation strategy for the table as a whole.
If you drop a fragmentation strategy by means of a DROP TABLE statement or by the INIT, DROP, or DETACH clauses of an ALTER FRAGMENT statement, you also drop any privileges that exist for the affected fragments. Similarly, if you drop a fragment of a table, you also drop any privileges that exist for the fragment.
Tables that are created as a result of a DETACH or INIT clause of an ALTER FRAGMENT statement do not keep the privileges that the former fragment or fragments had when they were part of the fragmented table. Instead, such tables assume the default table privileges.
If a table on which fragment privileges are defined is changed to a table with a round-robin strategy or some other expression strategy, the fragment privileges are also dropped, and the table assumes the default table privileges.