PPT Slide
The Object-Relational DBMS Evolution
- O-R extension #1: Abstract data types (ADTs)
- New column types and functions/methods
- E.g., text, image, audio, video, time series, point, line, OLE...
- For modeling new kinds of facts about enterprise entities
- Infrastructure for extenders/datablades/cartridges
- O-R extension #2: Row types
- Types and functions/methods for rows of tables
- Desirable features include references, inheritance, methods, late binding, and collection-valued attributes
- For modeling enterprise entities with relationships & behavior
- Infrastructure for DBMS-native object management
- Recent SQL3 merger: Structured types
- Can use for types of columns and/or tables