internal Action <IInternalObjectDBTransaction, AbstractBufferedWriter, object, object> GetSecondaryKeysKeySaver
(uint secondaryKeyIndex, string name)
{
return(_secondaryKeysSavers.GetOrAdd(secondaryKeyIndex,
idx => CreateSaverWithApartFields(ClientRelationVersionInfo.GetSecondaryKeyFields(secondaryKeyIndex),
$"Relation_{Name}_SK_{name}_KeySaver")));
}
void CalculateSecondaryKey(IInternalObjectDBTransaction tr, IList <KeyValuePair <uint, SecondaryKeyInfo> > indexes)
{
var keyWriter = new ByteBufferWriter();
var enumeratorType = typeof(RelationEnumerator <>).MakeGenericType(_clientType);
keyWriter.WriteByteArrayRaw(ObjectDB.AllRelationsPKPrefix);
keyWriter.WriteVUInt32(Id);
var enumerator = (IEnumerator)Activator.CreateInstance(enumeratorType, tr, this, keyWriter.GetDataAndRewind().ToAsyncSafe(), new SimpleModificationCounter());
var keySavers = new Action <IInternalObjectDBTransaction, AbstractBufferedWriter, object> [indexes.Count];
for (int i = 0; i < indexes.Count; i++)
{
keySavers[i] = CreateSaver(ClientRelationVersionInfo.GetSecondaryKeyFields(indexes[i].Key),
$"Relation_{Name}_Upgrade_SK_{indexes[i].Value.Name}_KeySaver");
}
while (enumerator.MoveNext())
{
var obj = enumerator.Current;
tr.TransactionProtector.Start();
tr.KeyValueDBTransaction.SetKeyPrefix(ObjectDB.AllRelationsSKPrefix);
for (int i = 0; i < indexes.Count; i++)
{
keyWriter.WriteVUInt32(Id);
keyWriter.WriteVUInt32(indexes[i].Key);
keySavers[i](tr, keyWriter, obj);
var keyBytes = keyWriter.GetDataAndRewind();
if (!tr.KeyValueDBTransaction.CreateOrUpdateKeyValue(keyBytes, ByteBuffer.NewEmpty()))
{
throw new BTDBException("Internal error, secondary key bytes must be always unique.");
}
}
}
}