OODBMS, cont.
New collection types:
- type constructors: set<>, bag<>, list<>
- iterators to loop through collection types. (foreach)
Gives a rudimentary “query language”
- how to do selection? projection?
- “join” set<emp *>emps, set<dept *>depts?
- can have pointers in this data model, with efficient pointer-based joins
- what RDBMS feature is missing here?