Re: Dead Space Map

Tom Lane wrote:
> Bruce Momjian <pgman@candle.pha.pa.us> writes:
> > One idea Simon and I had was to reuse heap rows where all indexed values
> > in the old row and the new row were the same, meaning the heap value
> > could be replaced without changing the indexes at all.  We thought this
> > would be very useful for frequently-updated rows.  It could also be used
> > if no index are on the table.
> 
> MVCC goes out the window, eh?  Not to mention transaction rollback ability?

If the old row is not visible to any transactions, why would it not work?

--  Bruce Momjian   http://candle.pha.pa.us SRA OSS, Inc.   http://www.sraoss.com
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