Hi,
Currently, EXPLAIN is the only way to know whether the plan is generic
or custom according to the manual of PREPARE.
https://www.postgresql.org/docs/devel/sql-prepare.html
After commit d05b172, we can also use pg_prepared_statements view to
examine the plan types.
How about adding this explanation like the attached patch?
Regards,
--
Atsushi Torikoshi