Hi, Yes, I'm sure, it's work. if you execute query by another program (program java), you must use the first solution [ps -ef | grep postgres and kill -9 (PID of your query)]. if you use pgsql terminal and you're connecting with postgres you can use select procpid, datname, usename, client_addr, current_query from pg_stat_activity where current_query!='<IDLE>'; SELECT pg_cancel_backend (procpid); Younus. -- View this message in context: http://postgresql.1045698.n5.nabble.com/How-to-stop-a-query-tp1924086p5717297.html Sent from the PostgreSQL - general mailing list archive at Nabble.com. -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general