FWIW the original CF entry in 2018-07 [1] was marked as RWF. I'm not sure what's the right way to resubmit such patches, so I've created a new entry in 2019-01 [2] referencing the same hackers thread (and with the same authors/reviewers metadata).
[1] https://commitfest.postgresql.org/19/1429/ [2] https://commitfest.postgresql.org/21/1927/ regards -- Tomas Vondra http://www.2ndQuadrant.com PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services