RE: CREATE INDEX and name only some columns

my same statement regarding select/omit LFs still applies. why build LFs
that have only specific fields??? What exactly do you gain from that? not
much. except more LFs with the same key structure containing other
selected fields (or heaven forbid includes all PF fields)??

Thanks,
Tommy Holden



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RE: CREATE INDEX and name only some columns






Tommy - Jeff is not using either select/omit or join logicals, as far as I
can see. He just wants the ability to have fewer than all the columns
along with the index, which is only available with DDS-defined logicals,
not DDL-defined logicals - heh - otherwise known as indexes and views.

It is true that views and indexes can be used in F-specs - but not
combined.

So he can create the PF with DDL, as others have suggested - then make the
LF over it to get the column-filtering he wants, and keyed.

Vern

-------------- Original message ----------------------
From: Tommy.Holden@xxxxxxxxxxxxxxxxxxxxx

"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."

i have to disagree on this point. DDS logicals are not necessary for
native I/O. as to avoiding the need for DDS capabilites you don't have

to

rewrite the world. I've never been a fan of select/omit or join logical

files. it becomes a tedious pain when you have 15 LFs that are keyed in

the order you need but every fricking one has a select/omit which makes
them totally useless to you. this is one of the reason you'll see 5
billion LFs over a single PF. create the LF (or SQL index) and code for

your conditions...

Thanks,
Tommy Holden



"Wilt, Charles" <WiltC@xxxxxxxxxx>
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RE: CREATE INDEX and name only some columns






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