set identity_insert on - SQL Server Forums

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set identity_insert on

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Topic

Zifter
Yak Posting Veteran

51 Posts

Posted - 2013-02-19 : 03:38:56

I have to work with an old 2005 database, where there are no foreign key constraints specified (I know).
Now I'm trying to copy some data from one SQL server (production) to another (test) with the following code

declare @ServerFrom as varchar(10)
declare @ServerTo as varchar(10)
declare @TableName as varchar(50)
declare @Fields as varchar(500)
declare @SqlStatement as varchar(max)

set @ServerFrom = 'ServerA';
set @ServerTo = 'ServerB';
set @TableName = 'MyDataBase.dbo.MyTable';
set @Fields = ' Field1, Field2, Field3 '

set @SqlStatement = 'delete from ' + @ServerTo + '.' + @TableName
exec(@SqlStatement);

set @SqlStatement = 'set identity_insert ' + @TableName + ' on'
exec(@SqlStatement);

set @SqlStatement = 'insert into ' + @ServerTo + '.' + @TableName + 
                    '(' + @Fields + ') ' + 
                    'select ' + @Fields + ' from ' + @ServerFrom + '.' + @TableName
exec(@SqlStatement);

set @SqlStatement = 'set identity_insert ' + @TableName + ' off'
exec(@SqlStatement);

But when I run this, I get the following message

Msg 544, Level 16, State 1, Line 1
Cannot insert explicit value for identity column in table 'MyTable' when IDENTITY_INSERT is set to OFF.

Although I used the statement "set identity_insert MyTable on".
What am I missing here?

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-02-19 : 04:17:42

there are not in a batch. it should be inside single statement


...
set @SqlStatement = 'delete from ' + @ServerTo + '.' + @TableName +';set identity_insert ' + @TableName + ' on;' + 'insert into ' + @ServerTo + '.' + @TableName + 
                    '(' + @Fields + ') ' + 
                    'select ' + @Fields + ' from ' + @ServerFrom + '.' + @TableName + ';set identity_insert ' + @TableName + ' off;'
exec(@SqlStatement);

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

Zifter
Yak Posting Veteran

51 Posts

Posted - 2013-02-19 : 04:44:39

That makes sense. Should have tried it.

Thanks visakh! You're the man.

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2013-02-19 : 05:12:35

welcome

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/

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