DB2 Logical Database Layout

In DB2, database objects such as tables, views, triggers, and routines are stored in schemas. Important schemas are the SYSIBM, SYSCAT, SYSFUN, and SYSPROC schemas. The SYSIBM schema stores most of the default tables and the SYSCAT schema contains most of the views. The SYSFUN schema contains the database functions (user defined functions, or UDFs) and the SYSPROC schema contains the database procedures. In DB2 terminology procedures and functions together are often described as routines.