Re: Converting plpgsql to use DTYPE_REC for named composite types

Hi

I'll stick this into the January commitfest, but I'd like to get it
> reviewed and committed pretty soon, because there are follow-on patches
> that need to get done in time for v11 --- in particular, we need to close
> out the lack of plpgsql support for domains-over-composite.
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I didn't checked code - just I did some performance tests and I am thinking
so performance is very good.

Master's record type has 50% speed of row type in my test. Patched has +/-
same speed.

I see very small slowdown for row type .. about 3% but I think so it is
acceptable - I tested some worst case.

Unfortunately - it breaks and very breaks all plpgsql related extensions -
pldebug, plprofiler, plpgsql_check. On second hand, there are only few
extensions of this kind.

Regards

Pavel

regards, tom lane
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