kill all postgresql code example

Example 1: postgres kill running query

--Stop the query normally
SELECT pg_cancel_backend(pid);

--Terminate immediately
SELECT pg_terminate_backend(pid);

Example 2: postgres kill all connections

SELECT 
    pg_terminate_backend(pid) 
FROM 
    pg_stat_activity 
WHERE 
    pid <> pg_backend_pid()
    AND datname = 'database_name';