public SingleResult Last(DateTime?to = null)
{
if (to.HasValue == false)
{
to = _to;
}
var date = to.Value;
while (true)
{
using (var holder = new TimeSeriesSliceHolder(_context, _documentId, _name).WithBaseline(date))
{
if (_table.SeekOneBackwardByPrimaryKeyPrefix(holder.TimeSeriesPrefixSlice, holder.TimeSeriesKeySlice, out _tvr) == false)
{
return(null);
}
}
InitializeSegment(out var baseline, out var segment);
date = new DateTime(baseline * 10_000);
if (segment.NumberOfLiveEntries == 0)
{
// find the prev segment
date = date.AddMilliseconds(-1);
continue;
}
SingleResult last = default;
if (to == DateTime.MaxValue)
{
last = segment.YieldAllValues(_context, date, includeDead: false).Last();
if (last.Timestamp < _from)
{
return(null);
}
last.Type = IsRaw ? SingleResultType.Raw : SingleResultType.RolledUp;
return(last);
}
foreach (var item in segment.YieldAllValues(_context, date, includeDead: false))
{
if (item.Timestamp > to)
{
return(last);
}
last = item;
last.Type = IsRaw ? SingleResultType.Raw : SingleResultType.RolledUp;
}
if (last?.Timestamp < _from)
{
return(null);
}
return(last);
}
}
protected override long ExecuteCmd(DocumentsOperationContext context)
{
var tss = _database.DocumentsStorage.TimeSeriesStorage;
var changes = 0L;
foreach (var(docId, items) in _dictionary)
{
var collectionName = _database.DocumentsStorage.ExtractCollectionName(context, items[0].Collection);
foreach (var item in items)
{
using (var slicer = new TimeSeriesSliceHolder(context, docId, item.Name).WithBaseline(item.Baseline))
{
if (tss.TryAppendEntireSegmentFromSmuggler(context, slicer.TimeSeriesKeySlice, collectionName, item))
{
// on import we remove all @time-series from the document, so we need to re-add them
tss.AddTimeSeriesNameToMetadata(context, item.DocId, item.Name);
continue;
}
}
var values = item.Segment.YieldAllValues(context, context.Allocator, item.Baseline);
tss.AppendTimestamp(context, docId, item.Collection, item.Name, values, verifyName: false);
}
changes += items.Count;
}
return(changes);
}
internal bool Init()
{
if (_from > _to)
{
return(false);
}
using (var holder = new TimeSeriesSliceHolder(_context, _documentId, _name).WithBaseline(_from))
{
if (_table.SeekOneBackwardByPrimaryKeyPrefix(holder.TimeSeriesPrefixSlice, holder.TimeSeriesKeySlice, out _tvr) == false)
{
return(_table.SeekOnePrimaryKeyWithPrefix(holder.TimeSeriesPrefixSlice, holder.TimeSeriesKeySlice, out _tvr));
}
return(true);
}
}
