public void IterateRelationRow(ODBIteratorRelationInfo relation, long pos)
{
var prefix = BuildRelationPrefix(relation.Id);
if (!_trkv.SetKeyIndex(prefix, pos))
{
return;
}
var prevProtectionCounter = _trkv.CursorMovedCounter;
if (_visitor == null || _visitor.StartRelationKey())
{
var keyReader = new SpanReader(_trkv.GetKey().Slice(prefix.Length));
var relationInfo = relation.VersionInfos[relation.LastPersistedVersion];
IterateFields(ref keyReader, relationInfo.PrimaryKeyFields.Span, null);
_visitor?.EndRelationKey();
}
if (_trkv.CursorMovedCounter != prevProtectionCounter)
{
if (!_trkv.SetKeyIndex(prefix, pos))
{
return;
}
}
if (_visitor == null || _visitor.StartRelationValue())
{
var valueReader = new SpanReader(_trkv.GetValue());
var version = valueReader.ReadVUInt32();
var relationInfo = relation.VersionInfos[version];
IterateFields(ref valueReader, relationInfo.Fields.Span, new HashSet <int>());
_visitor?.EndRelationValue();
}
}
public void IterateRelation(ODBIteratorRelationInfo relation)
{
var prefix = BuildRelationPrefix(relation.Id);
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
if (pos == 0)
{
if (!_trkv.FindFirstKey(prefix))
{
break;
}
}
else
{
if (_trkv.CursorMovedCounter != prevProtectionCounter)
{
if (!_trkv.SetKeyIndex(prefix, pos))
{
break;
}
}
else
{
if (!_trkv.FindNextKey(prefix))
{
break;
}
}
}
_fastVisitor.MarkCurrentKeyAsUsed(_trkv);
prevProtectionCounter = _trkv.CursorMovedCounter;
if (_visitor == null || _visitor.StartRelationKey())
{
var keyReader = new SpanReader(_trkv.GetKey().Slice(prefix.Length));
var relationInfo = relation.VersionInfos[relation.LastPersistedVersion];
IterateFields(ref keyReader, relationInfo.PrimaryKeyFields.Span, null);
_visitor?.EndRelationKey();
}
if (_trkv.CursorMovedCounter != prevProtectionCounter)
{
if (!_trkv.SetKeyIndex(prefix, pos))
{
break;
}
}
if (_visitor == null || _visitor.StartRelationValue())
{
var valueReader = new SpanReader(_trkv.GetValue());
var version = valueReader.ReadVUInt32();
var relationInfo = relation.VersionInfos[version];
IterateFields(ref valueReader, relationInfo.Fields.Span, new HashSet <int>());
_visitor?.EndRelationValue();
}
pos++;
}
}
void IterateSecondaryIndexes(ODBIteratorRelationInfo relation)
{
var version = relation.VersionInfos[relation.LastPersistedVersion];
foreach (var(secKeyName, secKeyIdx) in version.SecondaryKeysNames)
{
var secondaryKeyFields = version.GetSecondaryKeyFields(secKeyIdx);
if (_visitor == null || _visitor.StartSecondaryIndex(secKeyName))
{
var prefix = BuildRelationSecondaryKeyPrefix(relation.Id, secKeyIdx);
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
if (pos == 0)
{
if (!_trkv.FindFirstKey(prefix))
{
break;
}
}
else
{
if (_trkv.CursorMovedCounter != prevProtectionCounter)
{
if (!_trkv.SetKeyIndex(prefix, pos))
{
break;
}
}
else
{
if (!_trkv.FindNextKey(prefix))
{
break;
}
}
}
var reader = new SpanReader(_trkv.GetKey().Slice(prefix.Length));
foreach (var fi in secondaryKeyFields)
{
if (_visitor == null || !_visitor.StartField(fi.Name))
{
continue;
}
IterateHandler(ref reader, fi.Handler !, false, null);
}
_visitor?.NextSecondaryKey();
pos++;
}
_visitor?.EndSecondaryIndex();
}
}
}
