public TransactionCountingStateVisitor(TxStateVisitor next, StorageReader storageReader, ReadableTransactionState txState, CountsRecordState counts) : base(next)
{
this._storageReader = storageReader;
this._txState = txState;
this._counts = counts;
this._nodeCursor = storageReader.AllocateNodeCursor();
this._groupCursor = storageReader.AllocateRelationshipGroupCursor();
}
public override TxStateVisitor DecorateTxStateVisitor(StorageReader storageReader, Read read, CursorFactory cursorFactory, ReadableTransactionState state, TxStateVisitor visitor)
{
return(visitor);
}
public abstract TxStateVisitor DecorateTxStateVisitor(StorageReader storageReader, Read read, CursorFactory cursorFactory, ReadableTransactionState state, TxStateVisitor visitor);
public override TxStateVisitor DecorateTxStateVisitor(StorageReader storageReader, Read read, CursorFactory cursorFactory, ReadableTransactionState txState, TxStateVisitor visitor)
{
if (!txState.HasDataChanges())
{
// If there are no data changes, there is no need to enforce constraints. Since there is no need to
// enforce constraints, there is no need to build up the state required to be able to enforce constraints.
// In fact, it might even be counter productive to build up that state, since if there are no data changes
// there would be schema changes instead, and in that case we would throw away the schema-dependant state
// we just built when the schema changing transaction commits.
return(visitor);
}
return(getOrCreatePropertyExistenceEnforcerFrom(storageReader).decorate(visitor, read, cursorFactory));
}
