2026-03-12 20:23:15

tpt/cancel.sql

@@ -0,0 +1,43 @@
+-- Copyright 2018 Tanel Poder. All rights reserved. More info at http://tanelpoder.com
+-- Licensed under the Apache License, Version 2.0. See LICENSE.txt for terms & conditions.
+
+
+--------------------------------------------------------------------------------
+--
+-- File name:   cancel.sql
+-- Purpose:     Generates commands for canceling selected sessions
+--
+-- Author:      Tanel Poder
+-- Copyright:   (c) http://www.tanelpoder.com
+--              
+-- Usage:       @cancel <filter expression> (example: @cancel username='SYSTEM')
+--              @cancel sid=150
+--              @cancel username='SYSTEM'
+--              @cancel "username='APP' and program like 'sqlplus%'"
+--
+-- Other:       Oracle 12.2 or newer required!
+-- 
+--              This script doesnt actually cancel any sessions       
+--              it just generates the ALTER SYSTEM CANCEL SQL
+--              commands, the user can select and paste in the selected
+--              commands manually
+-- 
+--              See more info at:
+--                https://blog.tanelpoder.com/2010/02/17/how-to-cancel-a-query-running-in-another-session/
+--              
+--              Oracle 12.2 and 18c take SID,SERIAL#[,@inst_id,sql_id] as arguments. 
+--              Just SID,SERIAL# are enough for canceling the currently running SQL
+-- 
+--              An older resource manager technique that doesn't always seem to work (not fast enough at least):
+--
+--              EXEC DBMS_RESOURCE_MANAGER.SWITCH_CONSUMER_GROUP_FOR_SESS (sid, serial#, 'CANCEL_SQL'); 
+--
+--------------------------------------------------------------------------------
+
+SELECT 'ALTER SYSTEM CANCEL SQL '''||sid||','||serial#||''' -- '
+       ||username||' ['||NVL(sql_id, 'sql_id is null')||'] @'||machine||' ('||program||');' commands_to_verify_and_run
+FROM v$session
+WHERE &1
+AND sid != (SELECT sid FROM v$mystat WHERE ROWNUM = 1)
+/
+