Re: hamsterdb Transactional Storage (thanks to all of you)
From: <compdb_at_hotmail.com>
Date: Wed, 7 Oct 2009 15:59:01 -0700 (PDT)
Message-ID: <8ec898d9-e319-4dcc-aaac-8ebf7d3342ed_at_g22g2000prf.googlegroups.com>
Date: Wed, 7 Oct 2009 15:59:01 -0700 (PDT)
Message-ID: <8ec898d9-e319-4dcc-aaac-8ebf7d3342ed_at_g22g2000prf.googlegroups.com>
On Oct 5, 10:56 am, rp..._at_pcwin518.campus.tue.nl (rpost) wrote:
> >To NEST is to allow relations as attribute types.
> No, it is an operator that creates nested relations from flat relations.
Sure. So does EXTENDing by a relation attribute. I meant that if we have relation attributes we can write R NEST A using other operators. See Date & Darwen's TTM 3rd ed end of appendix A re GROUP.
> >If you have a generalized aggregate corresponding to series notation
> >you can express UNNEST as UNION over a set of tuples.
philip Received on Thu Oct 08 2009 - 00:59:01 CEST