Antonin Houska <ah(at)cybertec(dot)at> writes:
> I've noticed that the dummypp field of ProjectionPath is set but never read.
I do not think removing that field is a good idea, even if it's not used
in the current form of the logic. It's useful for debugging purposes at
least. See original commit comment at
https://git.postgresql.org/gitweb/?p=postgresql.git;a=commitdiff;h=8b9d323cb9810109e3e5aab1ead427cbbb7aa77e
regards, tom lane