Plateforme Level Extreme
Abonnement
Profil corporatif
Produits & Services
Support
Légal
English
Vfp50 - Auto Numbering
Message
De
21/04/1997 11:27:19
 
 
À
21/04/1997 09:43:01
Information générale
Forum:
Visual FoxPro
Catégorie:
Autre
Divers
Thread ID:
00029060
Message ID:
00029084
Vues:
30
>>I am trying to have new records AUTO NUMBER. My method
>>is to index on a unique number field and add one number and that is the new number for the next record.
>>Having problems like this...
>>the first user adds a record and the computer issues a number 3, at the same time the second user adds a record and the computer issues a number 4. Then first user decides to abort and the second user saves.
>>Now the second user has the number 4 for it's AUTO NUMBER and there is not a number 3 because the first
>>use did not save. How can I best do a AUTO NUMBER system?
>
>The common way to create unique record id (number) is following:
>1. System contains table 'Setup' with 2 fields: TableName C, Counter I.
>2. When user requests for new record id, he runs procedure to:
>- go to Setup and locate record by specific Tablename,
>- lock this record (RLOCK),
>- increment counter by 1,
>- use ne counter for INSERT command,
>- unlock Setup record.

thanks Edward... I see you using the 2 fields: TableName C, Counter I.
Are you using TableName C, because there might be more than one table
using AUTO NUMBERING? Inotherwords, if I only need one TABLE for AUTO NUMBERING, I do not have to use a field call TableName in the counter.dbf.
Robert Keith
Independent Developer
San Antonio, Texas
E-mail address:
rebelrob1@yahoo.com
Précédent
Suivant
Répondre
Fil
Voir

Click here to load this message in the networking platform