On Fri, Feb 26, 2010 at 9:54 AM, Gokulakannan Somasundaram <gokul007@gmail.com> wrote:
No, it's far from harmless. As soon as that heap TID gets filled with an unrelated tuple, you run the risk of indexscans alighting on and perhaps modifying the wrong tuple.
Tom, i think this will never happen. The only issue is when we need to go back to the index from heap. This is to update the timestamps of update/delete.