I wrote:
> After sleeping on this, I'm liking the idea of adding "touch" to our
> rule better.
I've pushed a patch along that line:
https://git.postgresql.org/gitweb/?p=postgresql.git;a=patch;h=826eff57c4c23f77314ba7151d3dc506ce0fa24c
Possibly the nix PG package would want to absorb that before our next
releases (which aren't scheduled until February).
regards, tom lane