Bruce Momjian <[EMAIL PROTECTED]> writes:
> If we only prune on an update (or insert) why not just do prune every
> time?

The problem is you can't prune anymore once you have existing pin on the
target page.  I'd really like to get around that, but so far it seems
unacceptably fragile --- the executor really doesn't expect tuples to
get moved around underneath it.

                        regards, tom lane

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