This article's tone or style may not reflect the encyclopedic tone used on Wikipedia. |
This article is missing information about Error: you must specify what information is missing.. |
The following Database Management Systems (DBMSs) have at least some object-relational features. They vary widely in their completeness and the approaches taken.
- DB2
- GigaBASE [1]
- Greenplum
- Informix
- Intersystems Cache [2]
- Oracle
- OpenLink Virtuoso
- UniSQL [3]
- Valentina [4]
- VMDS
- PostgreSQL
- Zope / ZODB
The following tables compare general and technical information for a number of object-relational database management systems. Please see the individual products' articles for further information. This article is not all-inclusive or necessarily up-to-date. Unless otherwise specified in footnotes, comparisons are based on the stable versions without any add-ons, extensions or external programs.
Fundamental features
Information about what fundamental ORDBMSes features are implemented natively.
| Type | Method | Type inheritance | Table inheritance | |
|---|---|---|---|---|
| Oracle | Yes | Yes[1] | Yes | No |
| OpenLink Virtuoso | Yes | No | Yes | Yes |
| PostgreSQL | Yes | No | No | Yes |
| Type | Method | Type inheritance | Table inheritance |
Notes:
- ^ No private methods, no way to call super method from a child.
Data types
Information about what data types are implemented natively.
| Array | List | Set | Multiset | Object reference | |
|---|---|---|---|---|---|
| Oracle | Yes | No | Yes | Yes | Yes |
| OpenLink Virtuoso | Yes | No | No | No | Yes |
| PostgreSQL | Yes | No | No | No | No |
| Array | List | Set | Multiset | Object reference |