Panagiotis Pediaditis, 14.09.2007 16:45:
> Well the problem is I am working on rdf query engine for persistent RDF
> data. The data is stored/structured in a specific way in the database.
> When i perform updates in parallel, because there are cross table
> dependencies, I end up with inconsistencies, For example One transaction
> reads to see if there is a resource so as to add a property where it is
> a subject. Then an other transaction deletes the resource after the
> first has decided that the resource is there but before it added the
> property.
> Thus it would be helpful for me to avoid the difficult task of
> dependency based locking and just lock the whole database.
> any ideas?
Hmm. To me this sounds like all those steps should in fact be _one_
transaction and not several transactions.
Thomas