CENTERS for MEDICARE AND MEDICAID SERVICES DATABASE ADMINISTRATION DB2 STANDARDS 9/1/2020 http://www.cms.hhs.gov/DBAdmin/downloads/DB2StandardsandGuidelines.pdf 9/1/2020 CMS DB2 Standards and Guidelines i OVERVIEW ................................................................................................................................................ 1 DB2 DATABASE DESIGN STANDARDS .................................................................................................. 1 1.1 DB2 Design Overview ......................................................................................................... 1 1.2 Databases ............................................................................................................................... 2 1.3 Tablespaces ............................................................................................................................ 3 1.4 Tables ....................................................................................................................................... 6 1.5 Columns ................................................................................................................................... 7 1.6 Referential Constraints (Foreign Keys) ........................................................................ 9 1.7 Table Check Constraints .................................................................................................. 11 1.8 Unique Constraints ............................................................................................................ 12 1.9 ROWID .................................................................................................................................... 13 1.10 Identity Columns ............................................................................................................ 15 1.11 Sequence Objects ........................................................................................................... 16 1.12 Views ................................................................................................................................... 17 1.13 Indexes ............................................................................................................................... 18 1.14 Table Alias ......................................................................................................................... 19 1.15 Synonyms .......................................................................................................................... 20 1.16 Stored Procedures .......................................................................................................... 21 1.17 User Defined Functions ................................................................................................ 22 1.18 User Defined Types ........................................................................................................ 22 1.19 Triggers .............................................................................................................................. 23 1.20 LOBs..................................................................................................................................... 23 1.21 Buffer Pools ....................................................................................................................... 24 1.22 Capacity Planning ........................................................................................................... 25 1.23 Space Requests ............................................................................................................... 25 APPLICATION PROGRAMMING ............................................................................................................... 26 2.1 Data Access (SQL) ............................................................................................................. 26 2.2 Application Recovery......................................................................................................... 28 2.3 Program Preparation ......................................................................................................... 28 2.3.1 DB2 Package..................................................................................................................... 28 2.3.2 DB2 Plan ............................................................................................................................. 29 2.3.3 Explains .............................................................................................................................. 29 2.4 DB2 Development Tools .................................................................................................. 29 NAMING STANDARDS ............................................................................................................................ 30 3.1.1 Standard Naming Format for DB2 Objects ........................................................... 30 3.1.2 Application Identifiers ................................................................................................... 36 3.1.3 Environment Identifiers ............................................................................................... 36 3.1.4 Obsolete Object names ................................................................................................ 37 3.2 Image Copy Dataset Names .......................................................................................... 38 3.3 DB2 Subsystem Names ................................................................................................... 40 3.4 Production Library Names ............................................................................................... 40 3.5 Test Library Names ........................................................................................................... 41 3.6 Utility Job Names ............................................................................................................... 41 3.7 DB2/ORACLE Naming Issues ......................................................................................... 42 SECURITY ................................................................................................................................................ 43 4.1 RACF Groups ........................................................................................................................ 43 4.1.1 DB2 Owner Groups ........................................................................................................... 43 4.1.2 Role Based Access Groups ............................................................................................. 43 ii CMS DB2 Standards and Guidelines 9/1/2020 4.1.3 DB2 specific RACF Groups ............................................................................................. 44 4.2 DB2 Security Administration .......................................................................................... 44 4.2.1 Development .................................................................................................................... 44 4.2.2 Integration ........................................................................................................................ 46 4.2.3 Validation.......................................................................................................................... 47 4.2.4 Production ......................................................................................................................... 48 4.3 Accessing DB2 Resources ............................................................................................... 49 4.3.1 Dynamic SQL Applications (SPUFI, SAS, QMF, DB2 Connect, etc.) ............ 50 4.3.2 Static SQL Applications ................................................................................................ 50 4.3.3 Execution Environments .............................................................................................. 50 DATABASE MIGRATION PROCEDURES ................................................................................................. 52 5.1 DB2 Database Migration Overview .............................................................................. 52 5.2 Preliminary Physical Database Design Review........................................................ 53 5.2.1 Pre-Development Migration Review Checklist ..................................................... 54 5.2.2 Development Setup ....................................................................................................... 54 5.3 Pre-Integration Migration Review ................................................................................ 58 5.3.1 Pre-Integration Migration Review Checklist ......................................................... 59 5.4 Pre-Production Migration Review ................................................................................. 61 5.4.1 Pre-Production Migration Review Checklist .......................................................... 62 DATABASE UTILITIES ............................................................................................................................ 64 6.1 CMS Standard DB2 Utilities ............................................................................................ 64 6.2 Restrictions on Utilities with QREPed Tables ........................................................... 65 DATABASE PERFORMANCE MONITORING ...........................................................................................