Executing multiple dynamic statements together over linked server
I need to execute three dynamic SQL statements synchronously on a linked server (SQL Server 2005) like this:
declare @statement nvarchar(max);
set @statement = 'exec ' + @server_name + '.' + @database_name + '.dbo.Foo;exec ' + @server_name + '.' + @database_name + '.dbo.Bar;exec ' + @server_name + '.' + @database_name + '.dbo.BigTime';
exec sp_executesql @statement;
To test this, I have a linked server setup that links to itself.
When executing this local (by removing the @server_name
), using SQL Profiler I see that it executes just fine as one statement. However, when I execute this via the linked server (using the @server_name
variable), I see in SQL Profiler that each statement gets executed separately, with sp_reset_connection
getting executed after each one.
The trace looks something like this:
Audit Login ....
exec database.dbo.Foo
exec sp_reset_connection
Audit Logout
Audit Login ....
exec database.dbo.Bar
exec sp_reset_connection
Audit Logout
Audit Login ....
exec database.dbo.BigTime
exec sp_reset_connection
Audit Logout
This is causing me problems. Is there any why I can specify to SQL Server to not call sp_reset_connection
between statements?
DECLARE @sql nvarchar(max),
@exec nvarchar(800) = QUOTENAME(@server_name)
+ N'.' + QUOTENAME(@databaseName);
SET @sql = N'EXEC dbo.Foo;'
+ N'EXEC dbo.Bar;'
+ N'EXEC dbo.BigTime;';
EXEC @exec @sql;
You are executing three calls to three linked servers, the result is exactly what you should be expecting (even if the 3 linked servers are not distinct). To achieve what describe, execute the calls as you describe: execute three procedures on one linked server:
linkedserver.master.dbo.sp_ExecuteSQL N'
exec dbname.dbo.Foo;
exec dbname.dbo.Bar;
exec dbname.dbo.BigTime;';
All you have to do is wrap this around in a dynamic built SQL:
declare @remoteStatement nvarchar(max), @localStatement nvarchar(max);
set @remoteStatement = N'exec ' + @database_name + N'.dbo.Foo;
exec ' + @database_name + N'.dbo.Bar;
exec '+ @database_name + N'.dbo.BigTime';
set @localStatement = @server_name + N'.master.dbo.sp_executesql @remoteStatement;';
exec sp_executesql @localStatement, N'@remoteStatement nvarchar(max)', @remoteStatement;