public static IList<string> GetRevisionsRequiringActivation(DocumentDatabase database)
        {
            var currentTime = SystemTime.UtcNow;
            database.WaitForIndexToBecomeNonStale(TemporalConstants.PendingRevisionsIndex, currentTime, null);

            const int pageSize = 1024;

            var qs = string.Format("{0}:[* TO {1:o}]", Activation, currentTime);

            var query = new IndexQuery {
                                           Start = 0,
                                           PageSize = pageSize,
                                           Cutoff = currentTime,
                                           Query = qs,
                                           FieldsToFetch = new[] { Constants.DocumentIdFieldName },
                                           SortedFields = new[] { new SortedField(Activation) }
                                       };

            var list = new List<string>();
            while (true)
            {
                var results = database.Query(TemporalConstants.PendingRevisionsIndex, query).Results;
                list.AddRange(results.Select(x => x.Value<string>(Constants.DocumentIdFieldName)));
                if (results.Count < pageSize)
                    return list;
                query.Start += pageSize;
            }
        }
        public static DateTime GetNextActivationDate(DocumentDatabase database)
        {
            var currentTime = SystemTime.UtcNow;
            database.WaitForIndexToBecomeNonStale(TemporalConstants.PendingRevisionsIndex, currentTime, null);

            var query = new IndexQuery {
                                           Start = 0,
                                           PageSize = 1,
                                           Cutoff = currentTime,
                                           FieldsToFetch = new[] { Activation },
                                           SortedFields = new[] { new SortedField(Activation) }
                                       };

            var result = database.Query(TemporalConstants.PendingRevisionsIndex, query).Results.FirstOrDefault();
            return result == null ? DateTime.MaxValue : result.Value<DateTime>(Activation);
        }