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Re: Dead Space Map
- From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
- To: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
- Cc: "Jim C. Nasby" <jnasby(at)pervasive(dot)com>, Greg Stark <gsstark(at)mit(dot)edu>, Heikki Linnakangas <hlinnaka(at)iki(dot)fi>, pgsql-hackers(at)postgresql(dot)org
- Subject: Re: Dead Space Map
- Date: Tue, 28 Feb 2006 12:25:27 -0500
Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes: > Tom Lane wrote: >> 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? The old row is ALWAYS visible to somebody, until you commit (if you ever do). You can't simply overwrite existing data. regards, tom lane
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