Исправление Legioner, 27.09.19 13:42 (текущая версия) :
select pg_terminate_backend(pid) from (values (19215), (19216), (19244)) as pids (pid)
Исходная версия Legioner, 27.09.19 13:41:
select pg_terminate_backend(pid) from (values (19215), (19216), (19244)) AS pids (pid)