RE: CREATE INDEX and name only some columns -- MIDRANGE-L

Why?

If you need it for native I/O, use a DDS logical.

As long as the physical file is defined with DDL, you get the important benefits of using DDL vs. DDS
including:
-Validation on Write instead of Read
-64K Access paths (when logical shares an SQL access path)

As long as you're using native I/O you're _are_ going to have to have DDS logicals. Unless you're
writing/rewriting from the ground up to avoid the need for capabilities only available to DDS
logicals.

HTH,
Charles

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff Crosby
Sent: Tuesday, September 11, 2007 4:29 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: CREATE INDEX and name only some columns

Poop.

Yes I need it for native I/O. I'll figure out another way.
But I _AM_ going to define this file via DDL.

--
Jeff Crosby
UniPro FoodService/Dilgard
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531

The opinions expressed are my own and not necessarily the
opinion of my company. Unless I say so.

-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Elvis Budimlic
Sent: Tuesday, September 11, 2007 4:23 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: CREATE INDEX and name only some columns

You can't create an index over a view.
You can create an index over select columns from the underlying
physical file (SQL table).

If you're referring to this index looking in DSPFFD as a

keyed LF that

lists all the fields from the underlying PF, there is no way around
this. Only fields that are keyed are the ones you list on

the CREATE

INDEX statement, but they all show. So if you were to

access this SQL

index with native I/O (RPG), that's what you'd get.

Elvis

RPG & DB2 Summit | Minneapolis | October 1-4 Mike Cain -

DB2 for i5/OS

Temporary Indexes - The Good, The Bad, The Ugly October 16
2007 System i Fall Technical Conference | Orlando | November
4-7 Celebrating 10-Years of SQL Performance Excellence on

IBM System

i, eServer iSeries and the server affectionately known as the AS/400

-----Original Message-----
From:
midrange-l-bounces+ebudimlic=centerfieldtechnology.com@xxxxxxxxxxxx
[mailto:midrange-l-bounces+ebudimlic=centerfieldtechnology.com
@midrange.com]
On Behalf Of Jeff Crosby
Sent: Tuesday, September 11, 2007 3:17 PM
To: 'Midrange Systems Technical Discussion'
Subject: CREATE INDEX and name only some columns

Can I create an SQL index and name the columns so that I'm only
including specific columns from the base table instead of

all columns?

Or do I need to create a view, and then an index over the view
(because a view can't have a 'key')?

I've been looking for examples creating an index with specific
columns, haven't found any, and therefore I think I can't do it.

Thanks.

--
Jeff Crosby
UniPro FoodService/Dilgard
P.O. Box 13369
Ft. Wayne, IN 46868-3369
260-422-7531

The opinions expressed are my own and not necessarily the

opinion of

my company. Unless I say so.

--
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