Re: [HACKERS] Does Oracle store values in indices?

[Tom Lane]

"Mikheev, Vadim" <[EMAIL PROTECTED]> writes:
> We could add transaction data to index tuples but this would increase
> their size by ~ 16bytes.

The increased space is the least of the drawbacks.  Consider also the
time needed to maintain N copies of a tuple's commit status instead of
one.  Even finding the N copies would cost a lot more than the single
disk transfer involved now ...

                        regards, tom lane