Antonin Houska <a...@cybertec.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


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