--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Source/Data/Linq/Builder/SqlInfo.cs	Thu Mar 27 21:46:09 2014 +0400
@@ -0,0 +1,61 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Reflection;
+using BLToolkit.Reflection;
+
+namespace BLToolkit.Data.Linq.Builder
+{
+	using Data.Sql;
+
+	public class SqlInfo
+	{
+		public ISqlExpression   Sql;
+		public SqlQuery         Query;
+		public int              Index   = -1;
+		public List<MemberInfo> Members = new List<MemberInfo>();
+
+		public SqlInfo()
+		{
+		}
+
+		public SqlInfo(MemberInfo mi)
+		{
+			Members.Add(mi);
+		}
+
+		public SqlInfo(IEnumerable<MemberInfo> mi)
+		{
+			Members.AddRange(mi);
+		}
+
+		public SqlInfo Clone()
+		{
+			return new SqlInfo(Members) { Sql = Sql, Query = Query, Index = Index };
+		}
+
+		public SqlInfo Clone(MemberInfo mi)
+		{
+			var info = Clone();
+			if (Members.Count == 0 || Members[0] != mi)
+				info.Members.Insert(0, mi);
+			else
+			{
+				
+			}
+			return info;
+		}
+
+		public bool CompareMembers(SqlInfo info)
+		{
+			return Members.Count == info.Members.Count && !Members.Where((t, i) => !TypeHelper.Equals(t, info.Members[i])).Any();
+		}
+
+		public bool CompareLastMember(SqlInfo info)
+		{
+			return
+				Members.Count > 0 && info.Members.Count > 0 &&
+				TypeHelper.Equals(Members[Members.Count - 1], info.Members[info.Members.Count - 1]);
+		}
+	}
+}