Thank you for review! My apologies for my errors. It seems i read developers wiki pages not enough carefully. I will reread wiki, code style and then update patch with all your remarks.
> The comment /* T if we added new NOT NULL constraints */ should > probably be changed to /* T if we should recheck NOT NULL constraints > */ or similar. Correct. Hm, probably I will also rename this property to verify_new_notnull for clarity > I'd suggest registering this with the next CommitFest. Already done in https://commitfest.postgresql.org/16/1389/ , i noticed this step in wiki