By adding "Relational Integrity" (if you don't have it already) the
select will be a lot faster. (and your files cleaner)
Tom E Stieger wrote:
Hope this helps.
1. Open System I navigator
2. Expand My AS/400 Connections
3. Expand the server you are connected to
4. Expand Databases
5. Right-Click on the database name for your system
6. Select Run SQL Scripts
7. Paste your SQL into the run SQL scripts
8. Select VisualExplain -> Explain
If any of the above do not exist you will have to configure.install the components.
-Tom Stieger
IT Manager
California Fine Wire
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of James H. H. Lampert
Sent: Monday, January 21, 2013 9:39 AM
To: Midrange Systems Technical Discussion
Subject: Re: Index question
On 1/21/13 9:19 AM, Alan Campin wrote:
The best way is to use Ops Navigator to run Visual Explain on the SQL
Statement and see what it recommends. You can also turn on debug and
get more detailed messages in the job log. Visual Explain is the best.
You might also check the Index Adviser in Ops Nav to see if it is
building any indexes when you run the SQL statement.
I remember that, from the database optimization class I took at IBM Rochester, some years ago. Although, dusting off the workbook from that class, I can't even remember how to get to Visual Explain, assuming I even *can* get to it on *our* box. (And the actual situation is on a customer box, for which we only have TN5250 access.)
I was able to open something called "System i Navigator" on our box (and could probably model the situation there), but is that even the same thing? I don't see anything that looks like a path to Visual Explain.
--
JHHL
--
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