Alter Database in Entity Framework 6

Question

I have update my EF to EF 6.0.2 in my code I have the following line of code:

 applicationDbContext.Database .ExecuteSqlCommand(@\"ALTER DATABASE
 CURRENT SE         


        

Answer 1

EF 6 changes the use of transactions with ExecuteSqlCommand

Starting with Entity Framework 6.0, ExecuteSqlCommand() by default will wrap the command in a transaction if one was not already present. There are overloads of this method that allow you to override this behavior if you wish.

EF 5 did not behave the same way. Your fix is appropriate.

You can now specify a TransactionalBehavior flag to instruct EF on how to handle transactions with this command.

var sqlCommand = String.Format("ALTER DATABASE {0} SET SINGLE_USER 
                                WITH ROLLBACK IMMEDIATE");
db.Database.ExecuteSqlCommand(TransactionalBehavior.DoNotEnsureTransaction, 
                              sqlCommand);

By using the DoNotEnsureTransaction flag, EF will not start a transaction before executing the command. This allows the ALTER DATABASE command to successfully execute.

Answer 2

If you are using Code First approach possible solution is

public partial class AlterDatabase : DbMigration
{
    public override void Up()
    {                                           
        Sql("ALTER DATABASE CURRENT SET RECOVERY FULL", true);
    }

    public override void Down()
    {

    }
}