private static IEnumerable <TResult> ExecuteSelectExpression <TResult>(
            QueryContext queryContext, IEntityType entityType, SelectExpression selectExpression)
            where TResult : class, new()
        {
            var context = ((AtsQueryContext)queryContext);
            var table   = new AtsTable(entityType.AzureTableStorage().Table);
            var query   = context.TableQueryGenerator.GenerateTableQuery(selectExpression);

            var request
                = new QueryTableRequest <TResult>(
                      table,
                      query,
                      s => (TResult)context.QueryBuffer
                      .GetEntity(entityType, context.ValueReaderFactory.Create(entityType, s)));

            return(context.GetOrAddQueryResults(request));
        }