Re: Declarative partitioning grammar

Markus Wanner <markus@bluegap.ch>

From: Markus Schiltknecht <markus@bluegap.ch>
To: Zeugswetter Andreas ADI SD <Andreas.Zeugswetter@s-itsolutions.at>
Cc: Tom Lane <tgl@sss.pgh.pa.us>, Jeff Cohen <jcohen@greenplum.com>, Warren Turkal <turkal@google.com>, Ron Mayer <rm_pg@cheapcomplexdevices.com>, Gavin Sherry <swm@alcove.com.au>, pgsql-hackers@postgresql.org
Date: 2008-01-15T16:54:18Z
Lists: pgsql-hackers
Hi,

Zeugswetter Andreas ADI SD wrote:
> Yes, but the problem with the timestamp partitioned tables is, that the
> window is sliding. Thus you would need two alter tables for each new
> period. One that changes the constraint + one that creates the new
> partition. So it seems natural to join the two concepts for such a
> partitioning syntax.

If you think in terms of split points, having to alter two table is not 
true. It's better

> Personally I find the automatic partition idea intriguing, where you
> only have to choose an expression that equates to one value (value
> group) per partition (and possibly a way to derive a partition name).
> Then a partition is automatically created when a new row arrives for a
> new value. That does not however address Tom's concern of rejecting data
> that is outside the acceptable window, but maybe that is better dealt
> with in the application anyways.
> 
> Andreas
> 
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