Re: Add index scan progress to pg_stat_progress_vacuum

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You should run "make check" and update rules.out.

You should also use make check-world - usually something like:
make check-world -j4 >check-world.out 2>&1 ; echo ret $?

> indrelid: The relid of the index currently being vacuumed

I think it should be called indexrelid not indrelid, for consistency with
pg_index.

> S.param10 vacuum_cycle_ordinal_position,
> S.param13 index_rows_vacuumed

These should both say "AS" for consistency.

system_views.sql is using tabs, but should use spaces for consistency.

> #include "commands/progress.h"

The postgres convention is to alphabetize the includes.

>       /* VACCUM operation's longest index scan cycle */

VACCUM => VACUUM

Ultimately you'll also need to update the docs.