Sorry. I do not know if there are any documentation about the tables and schema. You might use tools such DbVisualizer or Toad to view the schema and data content. Couple things to consider:
- Recommend moving off the DevTest Derby database to an Enterprise DBMS (tables/schemas will remain the same)
- Keep in mind the Schema is internal to DevTest; therefore, it can change without notification in a future release
- Take care to ensure that custom queries for reports do not compete with internal DevTest processing for CPU, tables, memory, etc. -- especially if the product's Derby database is in use