Postgres is the odd one out. MySQL [1] has plenty of index hints, including FORCE. In the proprietary world, MS SQL Server and Oracle also have query hints. I don't know if there's anything other than a wiki page [2] that hasn't been updated since 2015 that justifies it.

[1]: https://dev.mysql.com/doc/refman/8.0/en/index-hints.html [2]: https://wiki.postgresql.org/wiki/OptimizerHintsDiscussion