Re: Handling default fields on RPG WRITE

[Craig Richards <craig@xxxxxxxxxxxxxxxx>]

Funnily enough I was just looking at some of this stuff.

The RPG has no influence on the identity column.
You can clear the record format and the ID column will not be affected.

As far as defaults set up in the DDL,
I'm not aware of how you can be influenced by them in RPG.

My experience is that RPG will set up storage for all of the fields on the
file and initialise them to the default values for the data types, without
reference to how the table was defined in DDL.
In any case most people would Clear a record format before building it for
an RPG write I would have thought.

You cannot specify %Fields on the WRITE, like you can on UPDATE.

There is also a it of a catch with things like Dates where I believe SQL
inserts would default to the current date but RPG would default to *Loval (
well, it does for the *ISO dates I tested it with )

On 7 February 2018 at 13:19, Rob Berendt <rob@xxxxxxxxx> wrote:

> Assume you aren't using DDS but you're using DDL.
> Let's say you have a column like any of the following:
> - an identity column which is always generated
> - a column which is generated with other defaults, like current user, last
> changed timestamp, etc
> How do you prevent RPG from overriding it with the values from your
> program?
> Thoughts which immediately come to mind are:
> - Stop using RPG WRITE and use SQL and select only the columns you don't
> want defaulted
> - Use a logical for output which omits defaulted columns
> - Use O specs.  Do those still require you put column position?
> - Is there a %FIELDS like UPDATE has?
>
>
> Rob Berendt
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