?
Solved

AutoIncrement Access from BDE

Posted on 1997-06-03
3
Medium Priority
?
283 Views
Last Modified: 2010-04-06
Greetings,

We have an autoincrement field in a file (BDE/PARADOX) that has been set to a low value (how, is unknown at the moment).  We would like to be able to rewrite the header of the file so that the autoincrement field is set to a non-duplicate (proper) value again.  The code to get the largest existing value is a piece of cake.  The challenge is to rewrite the header with this value.  Anyone have any ideas?  The goal would be to write code to do this (rewrite the header).  We can not rewrite the file out since the autoincrement fields would be renumbered (other files need the existing numbers).

Thanks in advance....

John Wilson
Senior Software Engineer
PACS Software, Inc.
jwilson@pacsusa.com
0
Comment
Question by:PACS
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
3 Comments
 

Author Comment

by:PACS
ID: 1336793
This can be done through the database desktop by restructuring the table -- setting the minimum value for the auto-increment field, adding a record, and clearing the minimum value.  Would be nice to do in code though.  I've got the core of the program done... available BDE (doesn't work with normal Delphi calls) documentation is not good.  Any example of adding a minimum value to a file before the restructuring (dbidorestructure) in code would be useful.  jw (06/03/97).

0
 
LVL 1

Expert Comment

by:ygolan
ID: 1336794
John,

Just a suggestion - refrain from using Autoincrement fields as keys. If your table gets corrupted and you need to rebuild it, getting the BDE to use exactly the same values for the AI fields is very difficult.
0
 

Accepted Solution

by:
JGREER earned 400 total points
ID: 1336795
1. Rebuild the table (Autoincrement header info is either lost or incorrect.

2. Restructure the table setting the Autoincrement field(s) to 'I'nteger types.

3. Save the table.

4.  Restructure the table setting the Autoincrement field(s) back to AutoIncrement and save the table again.

5. The next record added will be last value +1

0

Featured Post

On Demand Webinar: Networking for the Cloud Era

Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction The parallel port is a very commonly known port, it was widely used to connect a printer to the PC, if you look at the back of your computer, for those who don't have newer computers, there will be a port with 25 pins and a small print…
Creating an auto free TStringList The TStringList is a basic and frequently used object in Delphi. On many occasions, you may want to create a temporary list, process some items in the list and be done with the list. In such cases, you have to…
This is my first video review of Microsoft Bookings, I will be doing a part two with a bit more information, but wanted to get this out to you folks.
Do you want to know how to make a graph with Microsoft Access? First, create a query with the data for the chart. Then make a blank form and add a chart control. This video also shows how to change what data is displayed on the graph as well as form…
Suggested Courses

718 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question