Catalogs

An SQL catalog is a collection of tables and views that describe tables, views, indexes, procedures, functions, sequences, triggers, variables, constraints, programs, packages, and XSR objects.

This information is contained in a set of cross-reference tables in libraries QSYS and QSYS2. In each SQL schema there is a set of views built over the catalog tables that contains information about the objects in the schema.

A catalog is automatically created when you create a schema. You cannot drop or explicitly change the catalog.