On Thu, 2022-05-19 at 14:37 -0700, Wells Oliver wrote: > Dropping triggers from some table yields a lock while a concurrent refresh of a materialized > view in another schema entirely is running-- why is this? That is because dropping a trigger requires a (brief) ACCESS EXCLUSIVE lock on the table, which conflicts with all concurrent access to the table. Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com