Foreign Scan on public.hs_fdw (cost=100.00..157.78 rows=7 width=36)
Output: id, h
Filter: ((hs_fdw.h -> 'a'::text) = '1'::text)
Remote SQL: SELECT id, h FROM public.hs
(4 rows)
In terms of "shippability" the "->" operator passes fine. It ends up not being shipped because its collation bubbles up as FDW_COLLATE_NONE, and gets kicked back as not deparseable around here: