Versant Object Database
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| Developer(s) | Versant Corporation |
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| Stable release |
9.2 / May 13, 2016
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| Development status | Active |
| Written in | Java, C, C#, C++, Smalltalk, Python |
| Operating system | Cross-platform Solaris, Linux, Windows (NT thru Vista), AIX, HP-UX (both 32 and 64 bit for all platforms) |
| Type | Object Database |
| License | All rights reserved |
| Website | www |
Versant Object Database (VOD) is an object database software product developed by Versant Corporation.
The Versant Object Database enables developers using object oriented languages to transactionally store their information by allowing the respective language to act as the Data Definition Language (DDL) for the database. In other words, the memory model is the database schema model.
In general, persistence in VOD in implemented by declaring a list of classes, then providing a transaction demarcation application programming interface to use cases. Respective language integrations adhere to the constructs of that language, including syntactic and directive sugars.
Additional APIs exist, beyond simple transaction demarcation, providing for the more advanced capabilities necessary to address practical issues found when dealing with performance optimization and scalability for systems with large amounts of data, many concurrent users, network latency, disk bottlenecks, etc.
Primary supported languages are Java, C# and C++. Versant also has language support for Smalltalk and Python.
VOD supports queries via a server side indexing and query execution engine. Query support includes both a Versant-specific and a standards-based query language syntax. Versant provides this query capability in a number of forms depending on the developer's chosen language binding. For example, in Java VOD provides VQL (Versant Query Language), JDOQL, EJB QL and OQL. In C++ Versant provides VQL and OQL, with C# support for VQL, OQL and LINQ. VOD will do optimization of query execution based on available attribute indexes. Versant also has support for standard SQL queries against the Versant database using ODBC/JDBC drivers.
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