System.Data.Common.DateTimeOffsetStorage.Aggregate C# (CSharp) Метод

        public override object Aggregate(int[] records, AggregateType kind)
        {
            bool hasData = false;
            try
            {
                switch (kind)
                {
                    case AggregateType.Min:
                        DateTimeOffset min = DateTimeOffset.MaxValue;
                        for (int i = 0; i < records.Length; i++)
                        {
                            int record = records[i];
                            if (HasValue(record))
                            {
                                min = (DateTimeOffset.Compare(_values[record], min) < 0) ? _values[record] : min;
                                hasData = true;
                            }
                        }
                        if (hasData)
                        {
                            return min;
                        }
                        return _nullValue;

                    case AggregateType.Max:
                        DateTimeOffset max = DateTimeOffset.MinValue;
                        for (int i = 0; i < records.Length; i++)
                        {
                            int record = records[i];
                            if (HasValue(record))
                            {
                                max = (DateTimeOffset.Compare(_values[record], max) >= 0) ? _values[record] : max;
                                hasData = true;
                            }
                        }
                        if (hasData)
                        {
                            return max;
                        }
                        return _nullValue;

                    case AggregateType.First:
                        if (records.Length > 0)
                        {
                            return _values[records[0]];
                        }
                        return null;

                    case AggregateType.Count:
                        int count = 0;
                        for (int i = 0; i < records.Length; i++)
                        {
                            if (HasValue(records[i]))
                            {
                                count++;
                            }
                        }
                        return count;
                }
            }
            catch (OverflowException)
            {
                throw ExprException.Overflow(typeof(DateTimeOffset));
            }
            throw ExceptionBuilder.AggregateException(kind, _dataType);
        }