Who Can Drop a Mapping
The DROP MAPPING statement can be executed by:
- 
The database owner — if the mapping is local 
- 
Users with the CHANGE_MAPPING_RULESsystem privilege — if the mapping is local
The DROP MAPPING statement can be executed by:
The database owner — if the mapping is local
Users with the CHANGE_MAPPING_RULES system privilege — if the mapping is local
DROP MAPPING examplesDROP MAPPING FROM_RT;