protected override IEnumerable<SqlRuleProblem> OnAnalyze(string name, TSqlObject table)
        {
            //Get the indexes of the table
            var indexes = table.GetReferencing(Index.IndexedObject);
            if (indexes.Count() == 0)
                yield return new SqlRuleProblem(string.Format("The anchor table {0} has no index", name), table);

            //Ensure that one of them is effecively not a clustered index
            var nonClusturedIndexes = indexes.Where(i => !i.GetProperty<bool>(Index.Clustered) && i.GetProperty<bool>(Index.Unique));
            if (nonClusturedIndexes == null)
                yield return new SqlRuleProblem(string.Format("No existing non-clustered unique index for the anchor table {0}", name), table);
            else
            {
                //Ensure that at least one of them is name BK
                var bkIndexes = nonClusturedIndexes.Where(i => i.Name.Parts.Last().StartsWith(Configuration.Anchor.BusinessKeyPrefix));
                if (bkIndexes.Count()==0)
                    yield return new SqlRuleProblem(string.Format("None of the non-clustered unique indexes for the anchor table {0} are starting by BK_", name), table);
                else
                {
                    foreach (var bkIndex in bkIndexes)
                    {
                        //Ensure that the unique index is not active on the identity column
                        var columns = bkIndex.GetReferenced(Index.Columns).Where(c => c.GetProperty<bool>(Column.IsIdentity));
                        if (columns.Count()>0)
                            yield return new SqlRuleProblem(string.Format("The business key (non-clustered unique index) {1} for the anchor table {0} contains the identity column.", name, bkIndex.Name), table);

                        //By default SQL Server will include the indentity column (because this column should be the clustered index)
                        var includedColumns = bkIndex.GetReferenced(Index.IncludedColumns).Where(c => c.GetProperty<bool>(Column.IsIdentity));
                        if (includedColumns.Count() > 0)
                            yield return new SqlRuleProblem(string.Format("The business key (non-clustered unique index) {1} for the anchor table {0} includes the identity column.", name, bkIndex.Name), table);
                    }
                }
            }
        }

        private SqlDataType GetDataType(TSqlObject something)
        {
            TSqlObject dataType = something.GetReferenced(Column.DataType).SingleOrDefault();

            if (dataType == null)
            {
                return SqlDataType.Unknown;
            }

            // Some data types don't cleanly convert
            switch (dataType.Name.Parts.Last())
            {
                case "hierarchyid":
                case "geometry":
                case "geography":
                    return SqlDataType.Variant;
            }

            // Note: User Defined Data Types (UDDTs) are not supported during deployment of memory optimized tables. 
            // The code below handles UDDTs in order to show how properties of a UDDT should be accessed and because
            // the model validation does not actually block this syntax at present there are tests that validate this behavior. 

            // User Defined Data Types and built in types are merged in the public model.
            // We want to examine the built in type: for user defined data types this will be
            // found by accessing the DataType.Type object, which will not exist for a built in type
            TSqlObject builtInType = dataType.GetReferenced(DataType.Type).SingleOrDefault();
            if (builtInType != null)
            {
                dataType = builtInType;
            }

            return dataType.GetProperty<SqlDataType>(DataType.SqlDataType);

        }

        protected override IEnumerable<SqlRuleProblem> OnAnalyze(string name, TSqlObject table)
        {
            //Get the indexes of the table
            var indexes = table.GetReferencing(Index.IndexedObject);
            if (indexes.Count() == 0)
                yield return new SqlRuleProblem(string.Format("The info table {0} has no index", name), table);

            //Ensure that one of them is effecively a clustered index
            var clusteredIndex = indexes.FirstOrDefault(i => i.GetProperty<bool>(Index.Clustered));
            if (clusteredIndex == null)
                yield return new SqlRuleProblem(string.Format("No clustered index for the info table {0}", name), table);
            else
            {
                //Ensure that this index is effectively unique
                var uniqueClusturedIndex = indexes.FirstOrDefault(i => i.GetProperty<bool>(Index.Clustered) && i.GetProperty<bool>(Index.Unique));
                if (uniqueClusturedIndex == null)
                    yield return new SqlRuleProblem(string.Format("Clustured index for the info table {0} is not unique ", name), table);
                else
                {
                    //Ensure that the clustered index is active only on the identity column
                    var columns = uniqueClusturedIndex.GetReferenced(Index.Columns);
                    if (columns.Count() > 1)
                        yield return new SqlRuleProblem(string.Format("The info table {0} has a clustered index but this index has more than one column.", name), table);

                    if (columns.Count(c => c.GetProperty<bool>(Column.IsIdentity)) == 0)
                        yield return new SqlRuleProblem(string.Format("The info table {0} has a clustered index but this index doesn't include the identity column.", name), table);
                }
            }
        }

        private static string GetScript(TSqlObject procedure)
        {
            var script = "";
            if (procedure.TryGetScript(out script))
                return script;

            return "";  //could throw an exception or logged this if we care??
        }

 private static void DumpScript(TSqlObject parent)
 {
     var script = "";
     if (parent.TryGetScript(out script))
     {
         Console.WriteLine(script);
     }
 }

 /// <summary>
 /// Gets a formatted element name
 /// </summary>
 public static string GetElementName(TSqlObject modelElement, SqlRuleExecutionContext ruleExecutionContext, ElementNameStyle style)
 {
     // Get the element name using the built in DisplayServices. This provides a number of useful formatting options to
     // make a name user-readable
     var displayServices = ruleExecutionContext.SchemaModel.DisplayServices;
     string elementName = displayServices.GetElementName(modelElement, style);
     return elementName;
 }

 protected bool IsAnchor(TSqlObject table)
 {
     return
         table.Name.HasName
         && table.Name.Parts.Reverse().Take(2).Last().Equals(Configuration.Anchor.Schema, StringComparison.OrdinalIgnoreCase)
         && table.Name.Parts.Last().StartsWith(Configuration.Anchor.Prefix, StringComparison.OrdinalIgnoreCase)
         && table.Name.Parts.Last().EndsWith(Configuration.Anchor.Suffix, StringComparison.OrdinalIgnoreCase);
 }

 private static string GetElementName(SqlRuleExecutionContext ruleExecutionContext, TSqlObject modelElement)
 {
     // Get the element name using the built in DisplayServices. This provides a number of 
     // useful formatting options to
     // make a name user-readable
     var displayServices = ruleExecutionContext.SchemaModel.DisplayServices;
     string elementName = displayServices.GetElementName(modelElement, ElementNameStyle.EscapedFullyQualifiedName);
     return elementName;
 }

        private bool IsDateTime2WithExcessiveScale(TSqlObject column)
        {
            var dataType = GetDataType(column);

            var scale = column.GetProperty<int>(Column.Scale);
            

            return (dataType == SqlDataType.DateTime2 && scale > 2);
        }

        private static bool HasParameterBeenRemoved(ModelRelationshipInstance parameter, TSqlObject oldProcedure)
        {
            /*
                A parameter does not exist in the old model
            */

            return
                oldProcedure.GetReferencedRelationshipInstances(Procedure.Parameters)
                    .FirstOrDefault(p => p.ObjectName.Parts.Last() == parameter.ObjectName.Parts.Last()) == null;
        }

        private static void ShowColumnsDataType(TSqlObject table)
        {
            foreach (var child in table.GetReferencedRelationshipInstances(Table.Columns))
            {
                var type = child.Object.GetReferenced(Column.DataType).FirstOrDefault();
                var isNullable = type.GetProperty<bool?> (DataType.UddtNullable);
                var length = type.GetProperty<int?>(DataType.UddtLength);

                //do something useful with this information!
            }
        }

        protected override IEnumerable<SqlRuleProblem> OnAnalyze(string name, TSqlObject table)
        {
            //Get the columns of the table
            var columns = table.GetReferenced(Table.Columns);
            if (columns.Count() == 0)
                yield return new SqlRuleProblem(string.Format("The link table {0} has no column", name), table);

            //Ensure that one of them is effecively a DateId
            var timeBasedColumn = columns.FirstOrDefault(i => i.Name.Parts.Last() == Configuration.TimeBased.Key);
            if (timeBasedColumn == null)
                yield return new SqlRuleProblem(string.Format("No column named '{0}' for link table {1}", Configuration.TimeBased.Key, name), table);
        }

        private  IList<SqlRuleProblem> DoSmells(TSqlObject SqlObject)
        {

            List<SqlRuleProblem> problems = new List<SqlRuleProblem>();


            Smells smellprocess = new Smells();

            int iRule = int.Parse(_ruleID.Substring(_ruleID.Length - 3));
            return (smellprocess.ProcessObject(SqlObject, iRule));

        }

      static  void DumpChildren(TSqlObject parent, int depth)
      {
          DumpScript(parent);
          foreach (var property in parent.ObjectType.Properties)
          {
              DumpProperty(property, parent);
          }

          foreach (var child in parent.GetChildren())
            {
                DumpChildren(child, depth + 1);
            }
      }

        public bool Add(string root, string name, TSqlObject item)
        {
            if (!SeemItems.ContainsKey(root))
            {
                SeemItems[root] = new Dictionary<string, TSqlObject>();
            }

            if (SeemItems[root].ContainsKey(name))
                return false;

            SeemItems[root][name] = item;
            return true;
        }

        private void AddPropertiesForIndex(Panel panel, TSqlObject index)
        {

            foreach (var reference in index.GetReferencedRelationshipInstances(Index.Columns))
            {
                panel.Children.Add(GetPropertyLabel("Column: ", reference.ObjectName + " " + (reference.GetProperty<bool>(Index.ColumnsRelationship.Ascending) ? "ASC" : "DESC")));
            }

            if (index.GetReferencedRelationshipInstances(Index.IncludedColumns).Any())
            {
                foreach (var reference in index.GetReferencedRelationshipInstances(Index.IncludedColumns))
                {
                    panel.Children.Add(GetPropertyLabel("Included Column: ", reference.ObjectName.ToString()));
                }
            }
        }

        protected override IEnumerable<SqlRuleProblem> OnAnalyze(string name, TSqlObject table)
        {
            var indexes = table.GetReferencing(Index.IndexedObject);
            var firstTimeIndexes = indexes.Where(i => i.GetReferenced(Index.Columns).First().Name.Parts.Last()
                                                    == Configuration.Link.IsFirst);
            if (firstTimeIndexes.Count() == 0)
                yield return new SqlRuleProblem(string.Format("No index where is-first column is '{0}' for link table {1}", Configuration.TimeBased.Key, name), table);

            foreach (var fIndex in firstTimeIndexes)
            {
                var indexColumns = fIndex.GetReferenced(Index.Columns).Where(c => c.Name.Parts.Last() != Configuration.TimeBased.Key);
                var includedColumns = fIndex.GetReferenced(Index.IncludedColumns);
                var allColumns = indexColumns.Union(includedColumns);

                if (allColumns.Count() == 0)
                    yield return new SqlRuleProblem(string.Format("The time-based index {0} for link table {1} has no additional or included columns", fIndex.Name, name), table);
                yield return new SqlRuleProblem(string.Format("The time-based index {0} for link table {1} has no additional or included columns", fIndex.Name, name), table);
            }
        }

        private bool HasDefaultValueBeenRemoved(ModelRelationshipInstance parameter, TSqlObject oldProcedure)
        {
            var newParameterHasDefault = parameter.Object.GetProperty(Parameter.DefaultExpression) != null;

            var parameterInOldModel =
                oldProcedure.GetReferencedRelationshipInstances(Procedure.Parameters)
                    .FirstOrDefault(p => p.ObjectName.Parts.Last() == parameter.ObjectName.Parts.Last());

            /*
                A parameter in the new model has no default but it had a default in the old model...
            */

            if (parameterInOldModel != null && !newParameterHasDefault && (parameterInOldModel.Object.GetProperty(Parameter.DefaultExpression) != null))
            {
                return true;
            }

            return false;
        }

        private static bool HasParameterBeenAddedWithoutDefaultValue(ModelRelationshipInstance parameter,
            TSqlObject newProcedure)
        {
            var hasDefault = parameter.Object.GetProperty(Parameter.DefaultExpression) != null;

            var parameterInOldModel =
                newProcedure.GetReferencedRelationshipInstances(Procedure.Parameters)
                    .FirstOrDefault(p => p.ObjectName.Parts.Last() == parameter.ObjectName.Parts.Last());

            /*
                A parameter did not exist in the old model and has no default
            */

            if (parameterInOldModel == null && !hasDefault)
            {
                return true;
            }

            return false;
        }

        protected override IEnumerable<SqlRuleProblem> OnAnalyze(string name, TSqlObject table)
        {
            var indexes = table.GetReferencing(Index.IndexedObject);
            var timeBasedIndexes = indexes.Where(i => i.GetReferenced(Index.Columns).First().Name.Parts.Last()
                                                    == Configuration.TimeBased.Key);
            if (timeBasedIndexes.Count() == 0)
                yield return new SqlRuleProblem(string.Format("No index where first column is '{0}' for link table {1}", Configuration.TimeBased.Key, name), table);

            foreach (var tbIndex in timeBasedIndexes)
            {
                var unexpectedColumns = tbIndex.GetReferenced(Index.Columns).Where(c => c.Name.Parts.Last() != Configuration.TimeBased.Key);
                if (unexpectedColumns.Count()>0)
                {
                    yield return new SqlRuleProblem(
                            string.Format(
                                    "The time-based index '{0}' for link table '{1}' contains additional columns. Unexpected column{2} '{3}'"
                                    , tbIndex.Name
                                    , name
                                    , (unexpectedColumns.Count() == 1) ? " is " : "s are  "
                                    , string.Join("', '", unexpectedColumns.Select(c => c.Name.Parts.Last()))
                            ), table);
                }

                var idColumns = table.GetReferenced(Table.Columns).Where(c => c.Name.Parts.Last() != Configuration.TimeBased.Key && c.Name.Parts.Last().EndsWith("Id"));
                var includedColumns = tbIndex.GetReferenced(Index.IncludedColumns);

                var missingColumns = idColumns.Except(includedColumns);
                if (missingColumns.Count()>0)
                {
                    yield return new SqlRuleProblem(
                            string.Format(
                                    "The time-based index '{0}' for link table '{1}' doesn't include some Id columns. Missing column{2} '{3}'"
                                    , tbIndex.Name
                                    , name
                                    , (missingColumns.Count() == 1) ? " is " : "s are  "
                                    , string.Join("', '", missingColumns.Select(c => c.Name.Parts.Last()))
                            ), table);
                }

            }
        }