On Tue, Apr 29, 2008 at 11:47 AM, Martijn van Oosterhout <
kleptog@svana.org> wrote:
On Tue, Apr 29, 2008 at 06:31:30AM +0530, Gurjeet Singh wrote:
> On Mon, Apr 28, 2008 at 8:01 PM, Erik Jones <
erik@myemma.com> wrote:
> > Postgres doesn't yet handle inheritance of constraints from parent to
> > child tables via inheritance.
> Was it done by design or was it a limitation we couldn't get over?
Inheritence of most constraints works, just not unique constraints. The
problem of managing a unique index over multiple tables has not yet
been solved (it's a reasonably hard problem).
I completely agree with the difficulty of the problem. One of the advantages of breaking up your data into partitions, as professed by Simon (I think) (and I agree), is that you have smaller indexes, which improve performance. And maybe having one huge index managing the uniqueness across partitioned data just defeats the idea of data partitioning!
Best regards,
--
gurjeet[.singh]@EnterpriseDB.com
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EnterpriseDB
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