Moin,
On Wednesday 16 December 2009 16:24:42 Robert Haas wrote:
> > Inserts and deletes follow the same protocol, obtaining an exclusive
> > lock on the row after the one being inserted or deleted. The result
> > of this locking protocol is that a range scan prevents concurrent
> > inserts or delete within the range of the scan, and vice versa.
> >
> > That sounds like it should actually work.
>
> Only if you can guarantee that the database will access the rows using
> some particular index. If it gets to the data some other way it might
> accidentally circumvent the lock. That's kind of a killer in terms of
> making this work for PostgreSQL.
Isnt the whole topic only relevant for writing access? There you have to
access the index anyway.
Andres