ObservingSailDataset needs to observe read data for optimized ordered reads

[nguyenm100]

Current Behavior

If you want to use the order pushdown logic (experimental in SailDataset), to preserve transactional isolation consistency, you'll need to add:

@OverRide
public CloseableIteration<? extends Statement> getStatements(StatementOrder order, Resource subj, IRI pred, Value obj,
Resource... contexts) throws SailException {
observer.observe(subj, pred, obj, contexts);
return super.getStatements(order, subj, pred, obj, contexts);
}

to ObservingSailDataset (a mirror of the non order version) for things to work.

Expected Behavior

everything to work though serialized isolation probably won't if using pushdown order logic

Steps To Reproduce

override

    public Set<StatementOrder> getSupportedOrders(Resource subj, IRI pred, Value obj, Resource... contexts) 
   public CloseableIteration<? extends Statement> getStatements(StatementOrder order, Resource subj, IRI pred,
                                                                 Value obj, Resource... contexts) throws SailException

in your SailDataset derived class.

Version

5.2.x

Are you interested in contributing a solution yourself?

None

Anything else?

No response