RE: SQL under the covers -- MIDRANGE-L

Thanks, Walden, for saying so well what I was trying to say. There IS no "generated" statement per se. The stuff is really all done under the covers.

In this case, DBMON showed that the substituted host variables make the statement look like this for the QRFLD = 'QQQ014'

select fhpro, fhonm, fhfamt + fhjamt as qnetfee, fhsua3 from frp001 Order by case when 'QQQ104' = 'QQQ104' then fhpro when 'QQQ104' = 'QQQ105' then fhonm when 'QQQ104' = 'QQQ111' then fhsua3 else null end

I tried this, using a file I had with different column names. I don't think it sorted - fetched in arrival sequence, AFAIK. Could it be hitting the NULL? Is it possible that things don't match because of escalating literals to VARCHAR, so the equality test fails?

Reeve, does this actually come out in the sorted order for you? I ran this on V5R3, not V5R2. I put the statement intoa program I called REEVE with a single 6-character parameter QRFLD.

Thanks
Vern

At 12:49 PM 7/12/2004, you wrote:

>Looking at the generated SQL code (with the SQL includes, SQLCA, etc.)
>doesn't tell me much.

It won't. The generated SQL code isn't used to access the data, it's
used to access the SQL engine. The SQL engine is responsible for
figuring out how to retrieve that data. You shouldn't see anything in
the RPG that "understands" how that SQL is run.

The best you can do is run the query in debug, but remember, run the
query against production data. The "right" way to retrieve a row from a
test table with 50 rows isn't the "right" way to get a row from the same
table with 50 million rows.

-Walden

------------
Walden H Leverich III
President & CEO
Tech Software
(516) 627-3800 x11
WaldenL@xxxxxxxxxxxxxxx
http://www.TechSoftInc.com

Quiquid latine dictum sit altum viditur.
(Whatever is said in Latin seems profound.)

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