Tom Lane wrote:
David Scott <davids@xxxxxxxxxxxxxx> writes:
Is the additional overhead of keeping full tuple visibility
information inside of the index so odious to the Postgres community as
to prevent a patch with this solution from being applied back to the
head?
This has been discussed and rejected before (multiple times). If you
want it considered you'll have to present stronger arguments than have
so far been made. The current consensus is that the probability of a
net performance win is not good enough to justify the large amount of
development effort that would be required.
What ever happened to grouped heap reads, i.e. building a list of tuples
from the index, sorting in heap order, then reading the heap in a batch?
The last I remember (maybe two years ago), it was being discussed but
no design decisions had been made. Is that what you're talking about?
-Glen
