I can't use different objects. It must be a single object that works for everything. That is why I think I'll need to go with a DDS LF.
Thanks
-----Original Message-----
From: Birgitta Hauser [mailto:Hauser@xxxxxxxxxxxxxxx]
Sent: Wednesday, November 06, 2019 1:08 PM
To: 'Midrange Systems Technical Discussion' <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: Alt index to SQL keyed view
I need a keyed LF that can be used in RPG RLA, QRY/400, and SQL. If I
use
a SQL view, I'm afraid I'll lose my keyed sequence.
Does that mean I have to use a DDS LF?
NO!
Just use the view and add an ORDER BY to your SQL-Statement or specify the sequence in your Query/400.
For Native I/O you can use the index (if you use the view with native I/O you may use the sequence, because a view is always unkeyed)
... I'm quite sure I described this in my article.
Mit freundlichen Grüßen / Best regards
Birgitta Hauser
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok) "What is worse than training your staff and losing them? Not training them and keeping them!"
"Train people well enough so they can leave, treat them well enough so they don't want to." (Richard Branson)
-----Original Message-----
From: MIDRANGE-L <midrange-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Justin Taylor
Sent: Mittwoch, 6. November 2019 18:52
To: Midrange Systems Technical Discussion <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: Alt index to SQL keyed view
I need a keyed LF that can be used in RPG RLA, QRY/400, and SQL. If I use a SQL view, I'm afraid I'll lose my keyed sequence.
Does that mean I have to use a DDS LF?
Thanks
-----Original Message-----
From: Birgitta Hauser [mailto:Hauser@xxxxxxxxxxxxxxx]
Sent: Wednesday, November 06, 2019 11:42 AM
To: 'Midrange Systems Technical Discussion' <midrange-l@xxxxxxxxxxxxxxxxxx>
Subject: RE: Alt index to SQL keyed view
You cannot access an SQL Index with SQL. You only can access views. It it the query optimizer which decides if or whether and which indexes are used.
If you created an index with enhanced indexing technologies (such as additionally generated key fields or where conditions) and you want to access these data, you either have to build the additional fields you need in the SELECT statement and/or add the where conditions to the SELECT statement.
Much better however is to create a view with the appropriate information (additional key fields and where conditions) and access the view.
Mit freundlichen Grüßen / Best regards
Birgitta Hauser
"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok) "What is worse than training your staff and losing them? Not training them and keeping them!"
"Train people well enough so they can leave, treat them well enough so they don't want to." (Richard Branson)
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