Terracloudx offers this software product repackaged where additional charges apply for technical support provided by Terracloudx , email support@terracloudx.com. Terracloudx PostgreSQL Pro OneClick is a powerful, open source object-relational database system that uses and extends the SQL language combined with many features that safely store and scale the most complicated data workloads. It can form the core database for almost any kind of service, application or system.