The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/14/sql-createtrigger.html
Description:
To be confirmed by the developer community...
The reference page about CREATE TRIGGER should indicate if it's allowed to
create triggers on temp tables.
This seems to be the supported, but I was wondering what happens with the
trigger name when created on a temp table.
It appears that no conflict can occur with other processes, and the same
trigger name can be used by different processes.
Checking the system tables, it appears that the trigger is created in user's
pg_my_temp_schema() ...