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();
}
}
void IterateRelation(uint relationIndex, string name)
{
var relationVersions = new Dictionary <uint, RelationVersionInfo>();
var lastPersistedVersion = ReadRelationVersions(relationIndex, name, relationVersions);
_tr.TransactionProtector.Start();
var o = ObjectDB.AllRelationsPKPrefix.Length;
var prefix = new byte[o + PackUnpack.LengthVUInt(relationIndex)];
Array.Copy(ObjectDB.AllRelationsPKPrefix, prefix, o);
PackUnpack.PackVUInt(prefix, ref o, relationIndex);
var protector = _tr.TransactionProtector;
long prevProtectionCounter = 0;
long pos = 0;
while (true)
{
protector.Start();
if (pos == 0)
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.FindFirstKey())
{
break;
}
}
else
{
if (protector.WasInterupted(prevProtectionCounter))
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.SetKeyIndex(pos))
{
break;
}
}
else
{
if (!_trkv.FindNextKey())
{
break;
}
}
}
_fastVisitor.MarkCurrentKeyAsUsed(_trkv);
prevProtectionCounter = protector.ProtectionCounter;
if (_visitor == null || _visitor.StartRelationKey())
{
var keyReader = new KeyValueDBKeyReader(_trkv);
var relationInfo = relationVersions[lastPersistedVersion];
IterateFields(keyReader, relationInfo.GetPrimaryKeyFields(), null);
_visitor?.EndRelationKey();
}
if (protector.WasInterupted(prevProtectionCounter))
{
_trkv.SetKeyPrefix(prefix);
if (!_trkv.SetKeyIndex(pos))
{
break;
}
}
if (_visitor == null || _visitor.StartRelationValue())
{
var valueReader = new KeyValueDBValueReader(_trkv);
var version = valueReader.ReadVUInt32();
var relationInfo = relationVersions[version];
IterateFields(valueReader, relationInfo.GetValueFields(), new HashSet <int>());
_visitor?.EndRelationValue();
}
pos++;
}
}
