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Last time I tested this it was way slower in SQL. must re-do that test some day and see how things have changed. SQL unlikely to match native still but might be closer.


Jon P.

On Aug 18, 2022, at 12:22 PM, Darren Strong <darren@xxxxxxxxx> wrote:

You can still do the equivalent of a chain, update and write in SQL.

Chain equivalent:
select fld1 into :FLD1
from file1
where condition1=:KEY1
fetch first row only

Update:
Update file1 set FLD1=:FLD1
Where condition1=:Key1

Write:
Insert into file1
(FLD1)
Values(:FLD1)

-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Greg Wilburn
Sent: Thursday, August 18, 2022 10:05 AM
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: SQL vs Native

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I'm developing logic to create a "transactional" file/table in an existing RPG program that creates labels.
I'm trying to capture information about the labels we produce using a service program procedure and SQL.

The catch is that the users will, on occasion, recreate/reprint a set of labels. So I need to ensure I'm not creating duplicate transactions.

With native access, I would simply CHAIN then UPDATE or WRITE based on %FOUND.
With SQL, I would have to do a DELETE then INSERT for each record.
Just wondering if there's an alternative to the SQL method?

I'm trying to go 100% SQL for file access.

Thanks,
Greg
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