--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Data/Linq/SqlExpressionAttribute.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,55 @@
+using System;
+using System.Reflection;
+
+namespace BLToolkit.Data.Linq
+{
+	using Data.Sql;
+	using Reflection;
+
+	[SerializableAttribute]
+	[AttributeUsageAttribute(AttributeTargets.Property | AttributeTargets.Method, AllowMultiple = true, Inherited = false)]
+	public class SqlExpressionAttribute : SqlFunctionAttribute
+	{
+		public SqlExpressionAttribute(string expression)
+			: base(expression)
+		{
+			Precedence = Data.Sql.Precedence.Primary;
+		}
+
+		public SqlExpressionAttribute(string expression, params int[] argIndices)
+			: base(expression, argIndices)
+		{
+			Precedence = Data.Sql.Precedence.Primary;
+		}
+
+		public SqlExpressionAttribute(string sqlProvider, string expression)
+			: base(sqlProvider, expression)
+		{
+			Precedence = Data.Sql.Precedence.Primary;
+		}
+
+		public SqlExpressionAttribute(string sqlProvider, string expression, params int[] argIndices)
+			: base(sqlProvider, expression, argIndices)
+		{
+			Precedence = Data.Sql.Precedence.Primary;
+		}
+
+		protected new string Name
+		{
+			get { return base.Name; }
+		}
+
+		public string Expression
+		{
+			get { return base.Name;  }
+			set { base.Name = value; }
+		}
+
+		public int Precedence { get; set; }
+
+		public override ISqlExpression GetExpression(MemberInfo member, params ISqlExpression[] args)
+		{
+			return new SqlExpression(TypeHelper.GetMemberType(member), Expression ?? member.Name, Precedence, ConvertArgs(member, args));
+		}
+	}
+}