Learn RPG-IV-AS400 with Real Code Examples

IBM i system (AS/400) as runtime environment

RPG IV programs compiled to program objects

DB2 for IBM i for data storage and queries

Service programs for modularization

CL programs or job scheduler for batch execution

Program objects compiled and stored in IBM i libraries

Interactive display files render on 5250 terminals

Batch programs execute as jobs controlled via CL or job scheduler

Service programs provide reusable logic to multiple programs

DB2 queries return data for processing or reporting

Procedural programming with modular procedures

Service program libraries for shared logic

Batch and interactive workflows

Tight coupling with DB2 database files

Library-based object management

Enterprise ERP systems

Banking transaction processing

Inventory and order management

Payroll and finance applications

Batch reporting and analytics

Business application optimization

Modular and reusable code structure

Tight DB2 integration

Support for batch and interactive processes

Backward compatibility with legacy RPG applications

Use modular procedures and service programs

Optimize DB2 queries and indexes

Batch large datasets to avoid terminal load

Reuse code to minimize compilation overhead

Monitor job performance and optimize loops

Refactor fixed-format RPG to free-form

Update service programs and procedure calls

Validate DB2 SQL queries against new version

Test interactive panels for terminal compatibility

Ensure batch jobs run with updated libraries