Re: SQL RPG Access Path Utilization - HELP ??

-----Original Message-----
From: Colin Williams <Williamsc@technocrats.co.uk>
To: 'RPG400-Lmidrangecom' <RPG400-L@midrange.com>
Date: Friday, March 26, 1999 1:35 PM
Subject: RE: SQL RPG Access Path Utilization - HELP ??


>You have created new logicals over existing physcals.
>
>OPNQRYF/SQL will either create a new access path or use an existing
>logical with the relevant keys/select-omit it requires if one is
>available, depending on which one is cheapest in performance terms. If
>that just happens to be your logical files, then there you go.
>So yes, if your logical is over a 'LIVE' physical, a producation job
>that uses SQL/OPNQRYF could potentially use your logical that is not in
>its library list!

Note, however, that all it uses is the access path.  It doesn't use the
record format of the logical unless it's specified on the FORMAT parameter
of OPNQRYF, or with SELECT * FROM the logical file in SQL.

---
Dave Shaw, General Nutrition, Greenville, SC
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The opinions expressed may not be my employer's unless I'm sufficiently
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