Solved

Cursor read-Only Error

Posted on 2011-02-28
3
700 Views
Last Modified: 2012-05-11
     
The following code gives an error of "cursor is read only".
The problem is caused by the order by clause of the Cursor select definition.
Is there a fix for this scenario.
Typically the table will contain records with Batch values of 100,120, 139, 200 ..etc and I wish to
update the Batch values as 10,20,30,40 ..etc  


                declare @n smallint
      declare @batch smallint
      DECLARE cursor1 CURSOR SCROLL_LOCKS
      FOR
      SELECT     Batch
      FROM       JazzCarryOver
      order by Batch FOR UPDATE OF Batch;

      OPEN cursor1;

        set @n = 10
      FETCH NEXT FROM Cursor1 into @batch
-- re number Batch in ascending order
      WHILE @@FETCH_STATUS = 0
      BEGIN
            UPDATE JazzCarryOver
            SET Batch = @n
            WHERE CURRENT OF cursor1;
            set @n = @n + 10
            FETCH NEXT FROM Cursor1 into @lotnum,@batch
    END;
      CLOSE Cursor1;
      DEALLOCATE Cursor1;

0
Comment
Question by:alcindor
[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
 
LVL 12

Assisted Solution

by:HugoHiasl
HugoHiasl earned 100 total points
ID: 35002369
updating a row in a cursor where multiple rows are aggregated by using a group by clause is not possible.

What would you expect the update to do? Updating ALL relevant rows or updating only the FIRST or LAST? Or one in the middle?

0
 
LVL 75

Accepted Solution

by:
Aneesh Retnakaran earned 400 total points
ID: 35002420
you dont really need a cursor here , use the following

declare @n int = 0
update JazzCarryOver
set @n = @n+10,
   batch = @n
0
 
LVL 2

Author Closing Comment

by:alcindor
ID: 35003237
Thanks guys,
0

Featured Post

Free Tool: Subnet Calculator

The subnet calculator helps you design networks by taking an IP address and network mask and returning information such as network, broadcast address, and host range.

One of a set of tools we're offering as a way of saying thank you for being a part of the community.

Question has a verified solution.

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

Ever needed a SQL 2008 Database replicated/mirrored/log shipped on another server but you can't take the downtime inflicted by initial snapshot or disconnect while T-logs are restored or mirror applied? You can use SQL Server Initialize from Backup…
I have a large data set and a SSIS package. How can I load this file in multi threading?
Via a live example, show how to extract information from SQL Server on Database, Connection and Server properties
Viewers will learn how to use the SELECT statement in SQL and will be exposed to the many uses the SELECT statement has.

688 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