RPG 4

Note that RPG IV can do just about anything that could be done by earlier versions of RPG such as RPG/400 and an enormous volume of additional capabilities.

Free-format RPG

• Free-format RPG on DeveloperWorks
  • 7.2: Integrated with the base OS
  • 7.1: Requires compiler PTF SI51094 or its supercedes, as well as DB2 group PTF SF99701 level 26 or higher.
  • 7.1 PTF first became available in Nov 2013.

Fully free-form RPG

RPG now allows for a syntax which contains no columns at all; it is fully free-form, beginning in column 1. To use, the first line of code must be **free starting in column 1. There is no predefined final column. There is one limitation: the program does not allow ANY columnar (fixed form) RPG, including comments with an asterisk in column 7. RDi 9.5 recognises this new syntax. It is provided as a PTF, but is not in a group or TR - it must be ordered separately. First available in November 2015.

• Fully Free-form RPG

7.1:

• SI58136 (compiler, target-release *CURRENT only)
• DB2 group PTF SF99701 level 38 (SQL precompiler)

7.2:

• SI58137 (compiler, target-release *CURRENT)
• SI58110 (compiler, target-release *PRV)
• DB2 group PTF SF99702 level 9 (SQL precompiler)

References

RPG IV with free format op codes

• Built In Functions
• Program To System Fields
• Function Key AID Bytes
• Free form calculation specifications

Books on RPG IV

• PDF of Who Knew You Could Do That with RPG IV? A Sorcerer's Guide to System Access and More (SG245402) at IBM Redbooks

Data Structure Information

• Program Status Data Structure
• Workstation Data Structure

Code Samples

• Locate field value field name
• SQLSTATE Constants

FAQ

• What does BINARY(4) mean in API documentation?

External Links

• Midware http://midwareservices.com/RPGIV/intro.htm
• Bryan Meyers http://www.bmeyers.net/