For using an object in external DB - this object should be registered.
1) Execute query "register"
REGISTER TABLE DOCUM.OBJECT_NAME (ANYFIELD CHAR(8))
/* where DOCUM - docbase owner
OBJECT_NAME - table/query
*/
2) Grant permission for users. Execute query "update"
update dm_registered object
set owner_table_permit=15
set group_table_permit=15
set world_table_permit=15
where object_name ='OBJECT_NAME '
A great artice about Registered Tables you may find by the link
http://www.bluefishgroup.com/1999/documentum-registered-tables/
set group_table_permit=15
set world_table_permit=15
where object_name ='OBJECT_NAME '
A great artice about Registered Tables you may find by the link
http://www.bluefishgroup.com/1999/documentum-registered-tables/