RE: Identity Columns -- RPG400-L

The way you have defined this uses 'generated always' for the identity
column - we cannot use this as it is not supported by our HA package. 

We need to use 'generated by default'...

Cheers,
Stu


-----Original Message-----
From: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Dave Murvin
Sent: Friday 29 April 2005 17:23
To: RPG programming on the AS400 / iSeries
Subject: Re: Identity Columns


How do you define the table?  I have an assets table that uses an asset
ID 
that gets created when the record is written in my RPGLE program with a 
regular write statement.  Field is defined as follows

create table Assets.Assets
        (Asset_ID               for column ASAssetID    integer not null
             generated always as identity
             (start with 1 increment by 1), ...

When I write the new record with RPGLE program, the asset_ID field value
is 
automatically created and incremented by 1 from the last Asset_ID field 
that was previously added to the file.   I believe that I initially
tested 
this with Ezview, but don't remember for sure as it was a couple of
years 
ago.

At 04:29 AM 4/29/2005, you wrote:
>I can't find anything in the IBM manuals to explain what is 'supposed'
>to happen when using an identity column with the identity value
>generated by default in RPG.
>
>An article by Kent Milligan on the iSeries network site at:
>http://www.iseriesnetwork.com/artarchive/index.cfm?fuseaction=viewartic
l
>e&CO_ContentID=15329&channel=art&subart=issue&issueid=677
>
>states that :
>
>"If a row is added via a non-SQL application interface (e.g., RPG
>Write), DB2 UDB will always generate the identity column value even if
>BY DEFAULT has been specified."
>
>However our (VR53) box doesn't behave in this manner - if an RPG
program
>writes a record or it is inserted by another means (eg. DFU without
>specifying a value for the identity column) it is written as zero.
>
>As I can't find IBM documentation saying how this is supposed to work,
I
>don't know if this is a bug, or it is working as designed... Is there a
>way (compile option?) to make the database generate the value for the
>identity column without specifying generated always (which doesn't work
>with our HA mirroring software)?

Dave Murvin
DRM Enterprises, Inc.


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