Re: I need to be able to use SQL to update a file from another file updating multiple records at a time.

This question is not RPG related and should be posted on MIDRANGE-L

However, the i supports updating like you are trying to do...you've
just got the syntax wrong. In fact, I believe you'd find that the
syntax you're using wouldn't work anywhere.

Repost your question on MIDRANGE-L and we can discuss.

Charles Wilt

On Wed, May 26, 2010 at 10:09 AM, Darryl Freinkel
<dfreinkel@xxxxxxxxxxxxxxxxx> wrote:

In doing research on using the SQL UPDATE command I found this structure
that works for other non IBM i systems.



Update EMS40DATA/INWHS01P set (IWADD1, IWADD2, IWADD3, IWALWS, IWADD4,
IWDESC)

= (Select LADD1, LADD2, LADD3, LALWH, LCOUN, LDESC  from SrcLibrary/SrcFile

Where exists (Select IWWHS from EMS40DATA/INWHS01P ))



IBM does not support this command in SQL and can only process 1 record at a
time. I have multiple records to process.



I am trying to find an alternative way to achieve the same result.



I have looked at using cursors to read my input file and move the results to
the update file using the SQL UPDATE command. However, I have a problem in
that:

- my RPG program uses a single program to process hundreds of files. None of
the input or output files are defined in the RPG program. I use the SQL
PREPARE and EXECUTE commands.

- I need a way to use the SQL FETCH command to fetch the fields into work
variables, which in turn will be used in the SQL UPDATE command. Ideally I
would like to create dynamic fields in the RPG program on the fly for this
purpose.



Has anyone done anything similar?

Do you have any suggestions/recommendations I could use.



TIA



Darryl Freinkel

Assignment 400 Group, Inc.

Tel: 770.321.8562 ext 111 | Fax 770.321.8562 | 2247 La Salle Dr, Marietta
GA, 30062, USA | PO Box 72556, Marietta, GA 30007-2556



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