Unlike LF, views don't have an access path. If you're working on performance, you'll want indexes. For that, Visual Explain is usually the best place to start.
From: Thomas Garvey [mailto:tgarvey@xxxxxxxxxx]
Sent: Friday, August 24, 2018 1:11 PM
To: RPG programming on the IBM i (AS/400 and iSeries) <rpg400-l@xxxxxxxxxxxx>
Subject: SQL Views worth it?
I'm developing a new application and trying to have the DB do as much of the work as possible.
So, I'm incorporating SQL Views but finding the throughput underwhelming.
Granted that some of the views are based on other views (in keeping with the attempt to have the DB do some work for me) but it appears that every time a view is queried the views are rebuilt by the OS.
I read somewhere that Views can be considered somewhat like logical files, but at least logicals can be set to have immediate updates as underlying physicals change.
Views have no such attribute settings.
So, what's considered best practices for SQL Views?
Should I just rewrite these things as logicals?
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