Re: CLUSTER TODO item

Is there an updated version of this patch for 7.3?

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Gavin Sherry wrote:
> On Thu, 11 Oct 2001, Tom Lane wrote:
> 
> > Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > > Can I get a status on this?
> > 
> > It's not gonna happen for 7.2, I think ...
> > 
> >             regards, tom lane
> 
> I'd love it to go out with 7.2 but I've had no time to work on this patch
> lately. The reason I need time is that, after having fiddled a fair bit,
> I've decided that there really needs to be support for the creation of a
> new relfilenode in the storage manager.
> 
> The current patch works like this:
> 
> Create new heap (heap_create())
> Copy tuples from old heap to new heap via index scan
> Form a new pg_class tuple
> simple_heap_update()
> update catalogue indices
> rebuild existing indices
> 
> This causes an overflow in the localbuf.c so I guess this is wrong
> (included in patch on 24/sep) =). I've looked at various combinations of
> this:
> 
> memcpy() the old Relation into a new Relation, update smgrunlink() the old
> Relation and heap_storage_create() the new relation. This dies because
> smgrunlink only schedules the drop, where as heap_storage_create() actually 
> creates a file on the file system (open() returns with EEXIST).
> 
> I've also tried just copying the structure but heap_open() relies on OID
> not relfilenode.
> 
> I'm probably going about it the wrong way, but it strikes me that there
> needs to be a way to abstract the relfilenode from OID in the heap access 
> code so that one can easily manipulate the heap on disk without having to 
> play with OIDs. 
> 
> I would have included code examples/clearer description but the box I
> don't have access to the box I created the patches on atm =(.
> 
> Gavin
> 
> 
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