> Of course, there's no much point in an index that's easily corrupted, so
> I understand the desire to implement WAL too -- I'm just pointing out
> that concurrency could have been developed independently.
Anything's possible with enough work, but having good support in -core
makes it easier and -core has usually been receptive to requests for
such things - for example, I think Tom put in quite a bit of work to
getting the right hooks in to enable libpqtypes.
...Robert