On 2016-02-28 15:03:28 -0500, Tom Lane wrote:
> Those with long memories will recall that I've been waving my arms about
> $SUBJECT for more than five years. I started to work seriously on a patch
> last summer, and here is a version that I feel comfortable exposing to
> public scrutiny (which is not to call it "done"; more below).
> So, where to go from here? I'm acutely aware that we're hard up against
> the final 9.6 commitfest, and that we discourage major patches arriving
> so late in a devel cycle. But I simply couldn't get this done any faster.
> I don't really want to hold it over for the 9.7 devel cycle. It's been
> enough trouble maintaining this patch in the face of conflicting commits
> over the last year or so (it's probably still got bugs related to parallel
> query...), and there definitely are conflicting patches in the upcoming
> 'fest. And the lack of this infrastructure is blocking progress on FDWs
> and some other things.
> So I'd really like to get this into 9.6. I'm happy to put it into the
> March commitfest if someone will volunteer to review it.
Hard. This is likely to cause/trigger a number of bugs, and we don't
have much time to let this mature. It's a change that we're unlikely to
be able to back-out if we discover that it wasn't the right thing to
integrate shortly before the release. On the other hand, this is a
major architectural step forward; one that unblocks a number of nice
features. There's also an argument to be made that integrating this now
is beneficial, because it'll cause less churn for patches being
developed while 9.6 is stabilizing.
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