WarehousePG ships with a large set of modules and supports additional separately installed packages. They fall into four categories:

• Bundled modules ship with WarehousePG and don't require a separate package install.
• Extensions are open source packages that require a separate install on each host before you can enable them.
• Procedural languages extend WarehousePG with additional programming languages for writing functions and stored procedures.
• External components are separately installed tools that integrate with WarehousePG but aren't database extensions.