This is the original source code of the database migration tool used by Adempiere ERP.
With Adempiere’s fork from Compiere, the Oracle license embedded in Compiere was no longer valid. This tool was borne to migrate ERP data from Oracle to PostgreSQL but also had the ability to upgrade databases to match different Adempiere versions. It therefore offered the same convenience as the paid update service available for Compiere.
After K.K. Alice contributed this migration tool to the Adempiere project, development of this original source code ceased. It lives on as part of the core Adempiere ERP project.