AW: Suggested technique

Hi,

there are even some SQL solutions:
1. Create a file with an identity column field.
   When adding a record into this file (even with native I/O)
   the next value is automatically calculated and inserted.

2. If you don't want to change your file and you are already on release
V5R3M0,
   you can use a SQL sequence object (CREATE SEQUENCE),
   which is nothing else than a data structure.
   You either can use NEXT VALUE FOR SequenceName directly in an insert
statement or
   retrieve the next value using a SET-STATEMENT.

C/EXEC SQL  Set :NextSeqNo = Next Value For MySequence
C/END-EXEC

Birgitta

-----Ursprungliche Nachricht-----
Von: rpg400-l-bounces@xxxxxxxxxxxx
[mailto:rpg400-l-bounces@xxxxxxxxxxxx]Im Auftrag von Carel Teijgeler
Gesendet: Samstag, 29. Januar 2005 12:39
An: rpg400-l@xxxxxxxxxxxx
Betreff: Re: Suggested technique


Tony,

If the memo records are created in a seperate programme, I would use a data
area.

Before you enter the programme you test the data area. If available, you can
enter the programme and write your memo. Otherwise an information error
(programme-defined) tells you , you cannot.

When you leave the memo-programme the data area is cleared.

Regards,
Cael Teijgeler

*********** REPLY SEPARATOR  ***********

On 28-1-05 at 15:07 Tony Carolla wrote:

>I am writing something to create memo records for accounts, detailing
>insurance billing denials.  The key to the file is account number and
>sequence number, and it requires unique keys.  Basically, my technique
>for writing is:
>
>- Chain using account#
>- if no matches, sequence=1
>- if %Found, SETGT using account#, READP, then add one to the sequnece
>number.
>
>I am building the outpt record, then performing the above and writing
>immediately.  But there still is a chance that somebody is sitting in
>the account, and might press enter on a new memo while my program is
>trying to add records, causing my program to error trying to write a
>duplicate record.  I am trying to visualize a soltion using a DOW loop
>and a Monitor group, but I would want the program to keep determining
>the next record number and retrying if there was an error.  I am not
>sure if I can just ITER if the error is found, or if I have to use a
>GOTO.
>
>Any suggestions?
>
>
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