Join fetch with Stateless Session

src/NHibernate/Dialect/MsSql2005Dialect.cs

@@ -5,6 +5,7 @@
 using NHibernate.Mapping;
 using NHibernate.SqlCommand;
 using NHibernate.Util;
+using NHibernate.Dialect.Function;
 
 namespace NHibernate.Dialect
 {
@@ -36,6 +37,13 @@ protected override void RegisterKeywords()
 			RegisterKeyword("xml");
 		}
 
+        protected override void RegisterFunctions()
+        {
+            base.RegisterFunctions();
+            RegisterFunction("extract", new SQLFunctionTemplate(NHibernateUtil.Int32, "datepart(?1, ?3)"));
+            RegisterFunction("bit_length", new SQLFunctionTemplate(NHibernateUtil.Int32, "datalength(?1) * 8"));
+        }
+
 		public override SqlString GetLimitString(SqlString queryString, SqlString offset, SqlString limit)
 		{
 			var result = new SqlStringBuilder();
@@ -170,7 +178,7 @@ private int GetAfterSelectInsertPoint(SqlString sql)
 		/// <param name="statement"> the statement to evaluate</param>
 		/// <returns>true if the statment contains no parenthesis or an equal number of
 		///  opening and closing parenthesis;otherwise false </returns>
-		private static bool HasMatchingParens(IEnumerable<char> statement)
+		protected static bool HasMatchingParens(IEnumerable<char> statement)
 		{
 			//unmatched paren count
 			int unmatchedParen = 0;

src/NHibernate/Dialect/MsSql2012Dialect.cs

@@ -0,0 +1,38 @@
+using System.Data;
+using NHibernate.Cfg;
+using NHibernate.Dialect.Function;
+using NHibernate.Driver;
+using NHibernate.SqlCommand;
+
+namespace NHibernate.Dialect
+{
+	public class MsSql2012Dialect : MsSql2008Dialect
+	{
+        public override SqlString GetLimitString(SqlString queryString, SqlString offset, SqlString limit)
+        {
+            var result = new SqlStringBuilder(queryString);
+
+            int orderIndex = queryString.LastIndexOfCaseInsensitive(" order by ");
+
+            //don't use the order index if it is contained within a larger statement(assuming
+            //a statement with non matching parenthesis is part of a larger block)
+            if (orderIndex < 0 || !HasMatchingParens(queryString.Substring(orderIndex).ToString()))
+            {
+                // Use order by first column if no explicit ordering is provided
+                result.Add( " ORDER BY ")
+                    .Add("1");
+            }
+
+            result.Add(" OFFSET ")
+                .Add(offset ?? new SqlString("0"))
+                .Add(" ROWS");
+
+            if (limit != null) 
+            {
+                result.Add(" FETCH FIRST ").Add(limit).Add(" ROWS ONLY");
+            }
+
+            return result.ToSqlString();
+        }
+    }
+}

src/NHibernate/NHibernate.csproj

@@ -134,6 +134,7 @@
     <Compile Include="Connection\IConnectionProvider.cs" />
     <Compile Include="Connection\UserSuppliedConnectionProvider.cs" />
     <Compile Include="Criterion\IEnhancedProjection.cs" />
+    <Compile Include="Dialect\MsSql2012Dialect.cs" />
     <Compile Include="Dialect\DB2Dialect.cs" />
     <Compile Include="Dialect\Dialect.cs" />
     <Compile Include="Dialect\FirebirdDialect.cs" />