"Hiroshi Inoue" <Inoue@tpf.co.jp> writes:
> Hmm,tuples of multiple version in a table ?
> This is neither clean nor easy for me.
I'm worried about it too. I think it could maybe be made to work,
but it seems fragile.
> I may be able to provide another implementation on trial and it
> may be easier than only objecting to your proposal.
If you have a better idea, let's hear it!
regards, tom lane