Simon Riggs <simon@2ndQuadrant.com> writes:
> On Mon, 2009-12-14 at 13:48 -0500, Tom Lane wrote:
>> Simon Riggs <simon@2ndQuadrant.com> writes:
>>> * Disallow clustering system relations. This will definitely NOT work
>>> * for shared relations (we have no way to update pg_class rows in other
>>> * databases), nor for nailed-in-cache relations (the relfilenode values
>>> * for those are hardwired, see relcache.c). It might work for other
>>> * system relations, but I ain't gonna risk it.
>>
>>> I would presume we would not want to relax the restriction on CLUSTER
>>> working on these tables, even if new VACUUM FULL does.
>>
>> Why not? If we solve the problem of allowing these relations to change
>> relfilenodes, then CLUSTER would work just fine on them. Whether it's
>> particularly useful is not ours to decide I think.
> I think you are probably right, but my wish to prove Schrodinger's Bug
> does not exist is not high enough for me personally to open that box
> this side of 8.6, especially when the previous code author saw it as a
> risk worth documenting.
You're talking to the "previous code author" ... or at least I'm pretty
sure that comment is mine.
regards, tom lane
