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Rather than depend on the overrides...

You might consider a dynamic statement that qualifies your files....

Just a thought...

Charles


On Fri, Feb 23, 2018 at 10:33 AM, Craig Richards <craig@xxxxxxxxxxxxxxxx>
wrote:

Hi Charles,

Yes I usually prefer that method too but not all files are RPG access.
In particular there is one with a CLOB on.
I don't believe you can open files with CLOBs in native RPG.

Also the program is building JSON objects using the DB2 JSON_OBJECT
publishing function from data on the trigger after image for insert into
the CLOB so that all needs to be SQL.

But I agree, I have a particular preference for ExtFile when I can get away
with it.

best regards,
Craig

On 23 February 2018 at 17:24, Charles Wilt <charles.wilt@xxxxxxxxx> wrote:

I wouldn't use an override....

Instead, use the EXTFILE() keyword on the f-spec..

Charles


On Fri, Feb 23, 2018 at 3:44 AM, Craig Richards <craig@xxxxxxxxxxxxxxxx>
wrote:

Hi Dieter,

I'm not sure I agree - I think I CAN control the environment:

I'm using the LIBRARY on the trigger buffer. That tells me
unequivocally
which library the file is in.
All my triggers run in a named activation group.
I am overriding all file access using an activation group override
which
I
remove at the end of the trigger.
The overrides specify Secure( *Yes )

I can't at the moment see why this wouldn't work - do you think there
is
a
problem?

best regards,
Craig

On 23 February 2018 at 10:37, D*B <dieter.bender@xxxxxxxxxxxx> wrote:

<Craig>
I agree that as you say, once added, the trigger program is qualified
it
will always be located when the trigger on the table fires.
I was really only asking about whether it's usual to force the
trigger
to
use files in the same library the file triggers from, and if there
was
a
simpler way in SQL triggers than doing what I'm doing with an RPGLE
program
trigger - either overriding or qualifying all file access )
( for example, I wondered if the more SQL-Trigger savvy would start
shouting at me, something like: USE AN SQL TRIGGER AND SET SCHEMA YOU
MUPPET! )
So far that hasn't happened...

I can see that in general the problem is bigger than just the data -
as
you
point out - if the trigger program had a requirement to call other
programs
then that would be an additional concern but thankfully in my case it
is
not required.

So I guess your last sentence is the one that interests me the most -
"use
SQL for all I/O operations and qualify in all statements"

Given that I will mostly ( I hope ) only be dealing with 4 or 5 files
in
each trigger I think for safety I will qualify all file access.
</Craig>

Have in mind, that you can't controll the environment the trigger is
running in!!!

you can't rely on naming SQL or SYS, you can't rely on current
schema,
curlib, libl; you don't know, wether OVRDBF was used outside,
OVRSCOPE
and
...

Don't make the qualify hardcoded, look at the PSDS from wich lib the
trigger was called and use this lib as a qualifier.


D*B


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