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Status Not under consideration
Workspace IBM i
Created by Guest
Created on Jan 20, 2016

DataStructure Subfield Access By Variable Property

Add new syntax to RPG for accessing subfields. RPG limits access to qualified data structure subfields to hard-coded names with dot notation. New syntax should be like Javascript property notation dataStruct['literal_name']
var fld = 'userName';

Subfield access by name is utilized in RPG's EVAL-CORR but is encapsulated by that function.

Use Case:

1.) feature would allow a subprocedure to accept a data structure and access the fields by any subfield (such as from user input) without having to utilize a SELECT WHEN expression.
2.) feature would reduce amount of hard-coding subfield names in code that produces JSON documents and other map-like structures
3.) develop library of functions around data structures

Idea priority Medium
  • Guest
    Feb 4, 2016

    Thank you for taking the time to suggest this enhancement. As this is a request for RPG, please submit a Design Change Request at:

  • Guest
    Jan 25, 2016

    Like Java's Map class's keySet() method, RPG should have means to get list of subfield names from data structure. See