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This article only applies to Atlassian's server products. Learn more about the differences between cloud and server.
Problem
Some Confluence troubleshooting steps require you to make changes to a SQL Server database. Depending on your SQL Server configuration, you may get the following error when making structure/schema changes:
Cause
This warning that prevents the actions from completing is caused by the Prevent saving changes that require table re-creation option being triggered in SQL Server. This option lets SQL Server to prevent structure changes when a table needs to be recreated and is intended as a security feature. However, this also prevents planned changes from completing.
Resolution
The resolution is to uncheck the Prevent saving changes that require table re-creation option:
As with all recommendations made by Atlassian Support, please follow best practices for Change Management and test and validate these settings in a Test/Development and Staging environment prior to rolling any changes into a Production environment. This is to validate these changes and ensure that they will function will within your infrastructure prior to placing these changes in production.
- Open SQL Management Studio as an administrator
- Go to Tools, then options then 'Designer'
- Uncheck the Prevent saving changes that require table re-creation
- Expand the database tables on the left object explorer of SQL Server and make the changes you plan to make
- You may want to re-check the Prevent saving changes that require table re-creation in order to for the security feature to warn again
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Problem
When designing a table you’re unable to save the changes.
When you try you receive the following message:
Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can’t be re-created or enabled the option Prevent saving changes that require table to be re-created.
Solution
This message appears by design when the changes to the table require it (or another table) to be dropped and recreated.
The message warns you of the significance of a table being dropped and recreated, giving you the opportunity to backup.
Once you have backed up your database and are ready to save the changes you will need to configure SQL Management Studio to apply the changes without giving the warning. The steps below detail how to do this.
- With SQL Management Studio open, click on the ‘Tools’ menu then ‘Options’
- In the left hand menu click on ‘Designers’
- Un-tick ‘prevent saving changes that require table re-creation’
- Click ‘OK’ to save the changes
- You can now save the changes to the table.
By: Atif Shehzad | Last Updated: 2009-04-29 | Comments (1) | Related Tips: More >SQL Server Management Studio
Problem
Working in SQL Server Management Studio (SSMS) 2008, I got a warning message while trying to save changes to a table 'saving changes is not permitted'. After the warning message the changes that I made were rolled back. I have the proper permissions to implement such DDL operations on that table, so how can I control this restriction and what are the pros and cons associated with this permission?
Working in SQL Server Management Studio (SSMS) 2008, I got a warning message while trying to save changes to a table 'saving changes is not permitted'. After the warning message the changes that I made were rolled back. I have the proper permissions to implement such DDL operations on that table, so how can I control this restriction and what are the pros and cons associated with this permission?
Solution
The message in question is shown below and I got this message when I tried to change the 'Allow Nulls' setting for column [GroupName] of <HumanResources.Department> table of AdventureWorks database the following warning was generated.
The message in question is shown below and I got this message when I tried to change the 'Allow Nulls' setting for column [GroupName] of <HumanResources.Department> table of AdventureWorks database the following warning was generated.
Saving changes is not permitted. The changes you have made require the following tables to be dropped and re-created. You have either made changes to a table that can't be re-created or enabled the option Prevent saving changes that require the table to be re-created. |
I have proper permissions for the DDL statements on this table and there are no locks on the table that should prevent it to be recreated. So the only other reason could be based on the part of the message 'or enabled the option Prevent Saving changes that require the table to be re-created'.
So let's go to this option and then we will go through a list of some scenarios when table re-creation is required and also the type of potential threats related to making such changes through SSMS
- From the menus select 'Tools' and then 'Options..'
- Click 'Designers' tab in left panel of frame
The marked option above is the one that when checked prevents any change in SSMS that requires table re-creation. By default this option is checked. You may uncheck it to allow you to make any changes through SSMS that require table re-creation. Once this option is un-checked, you will not even get a warning message for changes that require table re-creation and your changes will be implemented.
Some of scenarios in which table re-creation is required are
- Modifying data type of a column
- Inserting a column any where before last column of a table
- Modifying a computed column expression of a computed column
- Modifying the persistence property of a computed column
- Modifying the identity property of a column
- Modifying a NULL property of a column
- Re ordering of columns in a table
It is important to understand that there may be consequences that are associated with making such changes through SSMS. Microsoft strongly recommends to not turn off this option. You may experience loss of some information associated with that table or even loss of data in certain conditions. As an example of loss of associated information Microsoft Support mentions change track data associated with the table if the change track feature for a table is enabled. Also if the table holds a large amount of data then re-creation of table may lead to an operation time out and it may not complete.
Prevent Saving Changes Option Sql
Next Steps
Keeping in view the recommendations by Microsoft it is better to keep this option checked. But there may be some conditions where you may uncheck the option to easily work with SSMS designers. These conditions may be:
- You are working in test environment
- Some operations are required that are not possible though T-SQL. For example inserting a new column in middle of other columns. In such cases properly analyze the table for any issues/loss as result of table re-creation.
- You are sure that there is no associated data like change track data associated with any of your tables
- You are sure that hardware is quite capable to avoid any time out operations
For response of Microsoft support team on this issue visit the link http://support.microsoft.com/kb/956176/en-us
Last Updated: 2009-04-29
About the author
Atif Shehzad is a passionate SQL Server DBA, technical reviewer and article author.
View all my tips
View all my tips