Re: [HACKERS] Plans for solving the VACUUM problem

[Tom Lane]

Bruce Momjian <[EMAIL PROTECTED]> writes:
> I am confused why we can't implement subtransactions as part of our
> command counter?  The counter is already 4 bytes long.  Couldn't we
> rollback to counter number X-10?

That'd work within your own transaction, but not from outside it.
After you commit, how will other backends know which command-counter
values of your transaction to believe, and which not?

                        regards, tom lane

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