| From: | Gavin Sherry <swm(at)alcove(dot)com(dot)au> |
|---|---|
| To: | NikhilS <nikkhils(at)gmail(dot)com> |
| Cc: | Jeff Cohen <jcohen(at)greenplum(dot)com>, Warren Turkal <turkal(at)google(dot)com>, Ron Mayer <rm_pg(at)cheapcomplexdevices(dot)com>, pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: Declarative partitioning grammar |
| Date: | 2008-01-14 23:41:30 |
| Message-ID: | 20080114234130.GJ7216@europa.idg.com.au |
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| Lists: | pgsql-hackers |
On Sat, Jan 12, 2008 at 04:01:19PM +0530, NikhilS wrote:
> Hi,
>
> > We did look at allowing general functions for partitioning and this
> > was one concern. The other is that we want to enforce that a row
> > only gets inserted into a single partition, so we wanted a
> > declarative syntax where it was relatively easy to check that range
> > and list specifications don't overlap.
> >
>
> Detection of mutually exclusive ranges might not turn out to be so easy
> afterall. I think there is some code in the constraint_exclusion area which
> might help out in this.
In some prototyping code it didn't seem too difficult but if we've made
a mistake we might have to look at the CE code.
Thanks,
Gavin
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