Re: UniqueKey v2

hi.
After `git am`, I still cannot build.

../../Desktop/pg_sources/main/postgres/src/backend/optimizer/path/uniquekey.c:125:45:
error: variable ‘var’ set but not used
[-Werror=unused-but-set-variable]
  125 |                         Var                *var;
      |                                             ^~~


You also need to change src/backend/optimizer/path/meson.build.

git apply failed.

git am warning:
Applying: uniquekey on base relation and used it for mark-distinct-as-op.
.git/rebase-apply/patch:876: new blank line at EOF.
+
warning: 1 line adds whitespace errors.

I think you can use `git diff --check`
(https://git-scm.com/docs/git-diff) to check for whitespace related
errors.