|
-
isolation level serializable
Hi all,
can anyone give me more information on
set transaction isolation level serializable ?? I want to prove some lock to use on online insert and update.
Thank you every much.
________
Honda Interceptor
Last edited by sql; 03-06-2011 at 01:42 AM.
-
You can find details in sql books online.
-
This is the most restrictive lock and you lose all concurrency of the application, effecively making your application single user.
-
Hi skhanal,
I have interface , which alow the users to input data into database , should I set
set transaction isolation level serializable before my insert and update statement??
Thank you!
________
Vapor Genie Vaporizer
Last edited by sql; 03-06-2011 at 01:42 AM.
-
Don't have to since sql will handle that with locking by default.
-
Serializable should be used only in rare situations where you don't want anyone to access the data while the current user is using it. It holds lock for SELECT too.
If you think someone might update a row that you are trying to update, you can use UPDLOCK in this case. But this is also restrictive and I would not recommend it. If data changes, your ADO driver will know and error out, which can be handled by the application.
Last edited by skhanal; 07-08-2005 at 09:34 AM.
-
Hi skhanal.
Than you for your reply, are you suggest me to do update Sec01 with (updlock)
set Name='CK/HK/743.43/01'
where Name='CK/HK/743.43/2001' if at all my select statement I add select * from Table1 with (updlock,readpast) is there help??
#your ADO driver will know and error out, which can be handled by the application
can you give me more advice on this part ? maybe I can use it on Tomcat too
________
CHRYSLER WINDSOR SPECIFICATIONS
Last edited by sql; 03-06-2011 at 01:43 AM.
-
No, he's he's suggesting that you don't use any kind of special locking. Let SQL Server control the locking itself unless you can think up a darn good reason not to.
-
what error the message will show , are user understand the situation is some one apply an update, but not a bug on developer??
Thank you
________
VOLCANO DIGITAL
Last edited by sql; 03-06-2011 at 01:43 AM.
-
It will be something like "Another user has updated the record, please confirm if you want to overwrite it ..."
-
Hi,
please I want to know more on this part.
________
Nevada medical marijuana
Last edited by sql; 03-06-2011 at 01:44 AM.
-
-
Hi all,
actually, my question is How can i know , all how can i use code to tell the user the databas eis doing undate??
like if update
doing some
else
you can process or upload??
Thank you
________
Colorado Medical Marijuana
Last edited by sql; 03-06-2011 at 01:44 AM.
-
May check lock type the table holds to see if it's update lock.
-
can you give me some code?
Thank you
Posting Permissions
- You may not post new threads
- You may not post replies
- You may not post attachments
- You may not edit your posts
-
Forum Rules
|
|
Reply With Quote