Re: UPDATE of partition key

From: David Fetter <david(at)fetter(dot)org>
To: Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com>
Cc: pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: UPDATE of partition key
Date: 2017-02-14 16:54:01
Message-ID: 20170214165401.GA4525@fetter.org
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On Mon, Feb 13, 2017 at 05:31:56PM +0530, Amit Khandekar wrote:
> Currently, an update of a partition key of a partition is not
> allowed, since it requires to move the row(s) into the applicable
> partition.
>
> Attached is a WIP patch (update-partition-key.patch) that removes
> this restriction. When an UPDATE causes the row of a partition to
> violate its partition constraint, then a partition is searched in
> that subtree that can accommodate this row, and if found, the row is
> deleted from the old partition and inserted in the new partition. If
> not found, an error is reported.

This is great!

Would it be really invasive to HINT something when the subtree is a
proper subtree?

Best,
David.
--
David Fetter <david(at)fetter(dot)org> http://fetter.org/
Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter
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