Mantis #2095

Thank you, RuudL, for a complete adaptation of migration and estate
data to MSSQL, and the updating of the RegionData handling in MSSQL.

OpenSim/Data/MSSQL/MSSQLMigration.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Data;
+using System.Data.Common;
+using System.Reflection;
+using System.Text;
+
+namespace OpenSim.Data.MSSQL
+{
+    public class MSSQLMigration : Migration
+    {
+        public MSSQLMigration(DbConnection conn, Assembly assem, string type) : base(conn, assem, type)
+        {
+        }
+
+        public MSSQLMigration(DbConnection conn, Assembly assem, string subtype, string type) : base(conn, assem, subtype, type)
+        {
+        }
+
+        protected override int FindVersion(DbConnection conn, string type)
+        {
+            int version = 0;
+            using (DbCommand cmd = conn.CreateCommand())
+            {
+                try
+                {
+                    cmd.CommandText = "select top 1 version from migrations where name = '" + type + "' order by version desc"; //Must be 
+                    using (IDataReader reader = cmd.ExecuteReader())
+                    {
+                        if (reader.Read())
+                        {
+                            version = Convert.ToInt32(reader["version"]);
+                        }
+                        reader.Close();
+                    }
+                }
+                catch
+                {
+                    // Something went wrong, so we're version 0
+                }
+            }
+            return version;
+        }
+    }
+}