Why do we use the program status data structure (PSDS) in the RPG program? How do we declare it in RPG? Please provide examples for it. How do we do error handling using PSDS in an RPG program and what are the important sub-fields of PSDS that are looked at while doing error-handling in an RPG program?
The PSDS keyword for a free-form definition or the S letter, which appears in the 23rd position in a fixed format RPG, is used to identify it. It offers information on program exceptions and errors that the program can access.
To ensure that each module can only have a single PSDS, it must be defined in the main source section. Predefined subfields are present in a PSDS.
Declaring PSDS in Fixed format RPG program:
We can declare program status data structure in rpgle free format as follows: