Execute a large SQL script (with GO commands)

Solution 1:

Use SQL Server Management Objects (SMO) which understands GO separators. See my blog post here: http://weblogs.asp.net/jongalloway/Handling-_2200_GO_2200_-Separators-in-SQL-Scripts-2D00-the-easy-way

Sample code:

public static void Main()    
{        
  string scriptDirectory = "c:\\temp\\sqltest\\";
  string sqlConnectionString = "Integrated Security=SSPI;" +
  "Persist Security Info=True;Initial Catalog=Northwind;Data Source=(local)";
  DirectoryInfo di = new DirectoryInfo(scriptDirectory);
  FileInfo[] rgFiles = di.GetFiles("*.sql");
  foreach (FileInfo fi in rgFiles)
  {
        FileInfo fileInfo = new FileInfo(fi.FullName);
        string script = fileInfo.OpenText().ReadToEnd();
        using (SqlConnection connection = new SqlConnection(sqlConnectionString))
        {
            Server server = new Server(new ServerConnection(connection));
            server.ConnectionContext.ExecuteNonQuery(script);
        }
   }
}

If that won't work for you, see Phil Haack's library which handles that: http://haacked.com/archive/2007/11/04/a-library-for-executing-sql-scripts-with-go-separators-and.aspx

Solution 2:

This is what I knocked together to solve my immediate problem.

private void ExecuteBatchNonQuery(string sql, SqlConnection conn) {
    string sqlBatch = string.Empty;
    SqlCommand cmd = new SqlCommand(string.Empty, conn);
    conn.Open();
    sql += "\nGO";   // make sure last batch is executed.
    try {
        foreach (string line in sql.Split(new string[2] { "\n", "\r" }, StringSplitOptions.RemoveEmptyEntries)) {
            if (line.ToUpperInvariant().Trim() == "GO") {
                cmd.CommandText = sqlBatch;
                cmd.ExecuteNonQuery();
                sqlBatch = string.Empty;
            } else {
                sqlBatch += line + "\n";
            }
        }            
    } finally {
        conn.Close();
    }
}

It requires GO commands to be on their own line, and will not detect block-comments, so this sort of thing will get split, and cause an error:

ExecuteBatchNonQuery(@"
    /*
    GO
    */", conn);

Solution 3:

You can use SQL Management Objects to perform this. These are the same objects that Management Studio uses to execute queries. I believe Server.ConnectionContext.ExecuteNonQuery() will perform what you need.

Solution 4:

I look at this a few times at the end decided with EF implementation A bit modified for SqlConnection

public static void ExecuteSqlScript(this SqlConnection sqlConnection, string sqlBatch)
        {
            // Handle backslash utility statement (see http://technet.microsoft.com/en-us/library/dd207007.aspx)
            sqlBatch = Regex.Replace(sqlBatch, @"\\(\r\n|\r|\n)", string.Empty);

            // Handle batch splitting utility statement (see http://technet.microsoft.com/en-us/library/ms188037.aspx)
            var batches = Regex.Split(
                sqlBatch,
                string.Format(CultureInfo.InvariantCulture, @"^\s*({0}[ \t]+[0-9]+|{0})(?:\s+|$)", BatchTerminator),
                RegexOptions.IgnoreCase | RegexOptions.Multiline);

            for (int i = 0; i < batches.Length; ++i)
            {
                // Skip batches that merely contain the batch terminator
                if (batches[i].StartsWith(BatchTerminator, StringComparison.OrdinalIgnoreCase) ||
                    (i == batches.Length - 1 && string.IsNullOrWhiteSpace(batches[i])))
                {
                    continue;
                }

                // Include batch terminator if the next element is a batch terminator
                if (batches.Length > i + 1 &&
                    batches[i + 1].StartsWith(BatchTerminator, StringComparison.OrdinalIgnoreCase))
                {
                    int repeatCount = 1;

                    // Handle count parameter on the batch splitting utility statement
                    if (!string.Equals(batches[i + 1], BatchTerminator, StringComparison.OrdinalIgnoreCase))
                    {
                        repeatCount = int.Parse(Regex.Match(batches[i + 1], @"([0-9]+)").Value, CultureInfo.InvariantCulture);
                    }

                    for (int j = 0; j < repeatCount; ++j)
                    {
                       var command = sqlConnection.CreateCommand();
                       command.CommandText = batches[i];
                       command.ExecuteNonQuery();
                    }
                }
                else
                {
                    var command = sqlConnection.CreateCommand();
                    command.CommandText = batches[i];
                    command.ExecuteNonQuery();
                }
            }
        }