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A colleague asked me about this and I haven't been able to find any definitive information.

For RPG (IV, but not ILE) doing CHAINs, SETLLs, and READs - which is faster, an indexed PF or a flat PF with an LF defined with the key? For the sake of this question, let's assume we're talking about a single key field. The file is DDS-defined, and must remain that way for now. And for this example we're not interested in rewriting the RPG using SQL.

We're on 7.1.


Thoughts please?

TIA.


~TA~

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