On 2015/11/13 11:31, Kouhei Kaigai wrote:
On 2015/11/12 2:53, Robert Haas wrote:
From my point of view I'm now
thinking this solution has two parts:
(1) Let foreign scans have inner and outer subplans. For this
purpose, we only need one, but it's no more work to enable both, so we
may as well. If we had some reason, we could add a list of subplans
of arbitrary length, but there doesn't seem to be an urgent need for
that.
I wrote:
But one thing I'm concerned about is enable both inner and
outer plans, because I think that that would make the planner
postprocessing complicated, depending on what the foreign scans do by
the inner/outer subplans. Is it worth doing so? Maybe I'm missing
something, though.
If you persuade other person who has different opinion, you need to
explain why was it complicated, how much complicated and what was
the solution you tried at that time.
The "complicated" is a subjectively-based term. At least, we don't
share your experience, so it is hard to understand the how complexity.
I don't mean to object that idea. I'm unfamiliar with that idea, so I
just wanted to know the reason, or use cases.
Best regards,
Etsuro Fujita
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