RE: Faster key lookup -- RPG400-L

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I've never heard of user indexes, but it sounds like what I'm looking for. I found the API's for reading and writing. There was a performance warning about auto-flushing to disk, but I don't imagine that would be a problem since I’d only be writing once a day.

My final condition, "And (COLUMN4 = :local4 or :local4 = '');" would be an issue. I'm not sure what the point of that was, so I'm going to have to research it.

-----Original Message-----
From: Mark S Waterbury [mailto:mark.s.waterbury@xxxxxxxxxxxxx]
Sent: Wednesday, June 27, 2018 7:52 PM
To: rpg400-l@xxxxxxxxxxxx
Subject: Re: Faster key lookup

Justin,

Create a User Index, and read the file, and use the MI built-in instruction INSINXEN to insert index entries into that *USRIDX object, and then your look-up procedure can just use the MI built-in FNDINXEN instruction.

This should be very fast. You can even "pin" the *USRIDX object in a memory pool, by using the SETACCST MI instruction, or using the SETOBJACC command.

Then, once a day, or as needed, just refresh the contents -- probably simplest to just delete and recreate the whole *USRIDX object.

Hope that helps,

Mark S. Waterbury

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