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  2. RPG400-L
  3. March 2005

RE: Arrays

Hi Alan,


If you are getting that big, I would be looking at a User Index. That's what they are designed for.


Maybe. Depends on what you mean by "that big." A user index is limited to only 2000 bytes per entry, whereas an array has no such limitation. User indexes must be keyed, and can have only one key.

If you want to be able to sort it any number of different ways, they're not practical since you'd have to re-build the index for every possible sequence.

Likewise, if you want to read things in arrival sequence all the time, a user index would be much slower than direct memory access.

It really depends on what your application does and what your project goals are. A user index is often a great choice -- but there are many circumstances where it's not.


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