Alter Database in Stored Procedure - sql

Question

I'm trying to create a new stored procedure to execute an Alter Database command to modify the database Service Tiers.
So, I've tried to create the stored procedure but It doesn't work and it returns an error
Incorrect syntax near '('.
Could someone tell me how can I do this? Or where is the syntax error?
I've run this one out of any stored procedure and it worked.
Thanks in advance.
create procedure spChangeTiersDB
#MaxSize varchar(8),
#Edition varchar(20),
#Service varchar(5)
as
begin
ALTER DATABASE DB_Name
MODIFY (
MAXSIZE = #MaxSize,
EDITION = #Edition,
SERVICE_OBJECTIVE = #Service)
end

Answer 1

You cannot parameterize ALTER DATABASE statements
https://social.msdn.microsoft.com/Forums/sqlserver/en-US/578d87fa-9939-4cb0-bb72-e37cee8abf25/can-i-pass-parameter-to-an-alter-database-command
As suggested on the MSDN forum link, use Dynamic SQL instead
CREATE PROCEDURE spChangeDBtier
#MaxSize VARCHAR(10),#Edition VARCHAR(10),#Service VARCHAR(10) AS BEGIN
DECLARE #SQL NVARCHAR(MAX)
SET #SQL = CONCAT('ALTER DATABASE dbname MODIFY ( MAXSIZE =',#MaxSize,'GB, Edition = ''',#Edition,''',SERVICE_OBJECTIVE = ''',#Service,''')')
EXEC(#SQL)
END
Sample execution:
spChangeDBtier '500','PREMIUM','P1'

Answer 2

It seems we can't do those changes with something unattended like stored procedures, functions, etc. So, I've made something in C# to change from the server. That's my answer at the moment. If someone else has the same problem here is the code to help.
public static bool ChangeDBTier(string DbName, string MaxSize, string Edition, string Service)
{
try
{
using (SqlConnection con = new SqlConnection(ConnectionString))
{
con.Open();
String sqlCommandText = #"ALTER DATABASE " + DbName + " MODIFY (MAXSIZE = " + MaxSize + ", EDITION = '" + Edition + "', SERVICE_OBJECTIVE = '" + Service + "')";
SqlCommand sqlCommand = new SqlCommand(sqlCommandText, con);
sqlCommand.ExecuteNonQuery();
}
return true;
}
catch
{
return false;
}
}

Answer 3

CREATE PROCEDURE #spChangeDBtier
#MaxSize VARCHAR(10),#Edition VARCHAR(10),#Service VARCHAR(10) AS BEGIN
DECLARE #SQL NVARCHAR(MAX)
set #sql = 'alter database test modify(maxsize = '+ #MaxSize + ', edition = ''' + #MaxSize + ''' , service_objective = ''' + #MaxSize + ''')'
EXEC #SQL
END
You can always specify max size but I don't think that is needed as size won't impact billing significantly