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Current File : /www/server/mysql/src/scripts/sys_schema/views/i_s/x_innodb_lock_waits.sql
-- Copyright (c) 2014, 2023, Oracle and/or its affiliates.
--
-- This program is free software; you can redistribute it and/or modify
-- it under the terms of the GNU General Public License, version 2.0,
-- as published by the Free Software Foundation.
--
-- This program is also distributed with certain software (including
-- but not limited to OpenSSL) that is licensed under separate terms,
-- as designated in a particular file or component or in included license
-- documentation.  The authors of MySQL hereby grant you an additional
-- permission to link the program and your derivative works with the
-- separately licensed software that they have included with MySQL.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-- GNU General Public License, version 2.0, for more details.
--
-- You should have received a copy of the GNU General Public License
-- along with this program; if not, write to the Free Software
-- Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

--
-- View: x$innodb_lock_waits
--
-- Give a snapshot of which InnoDB locks transactions are waiting for.
-- The lock waits are ordered by the age of the lock descending.
--
-- Versions: 5.1+ (5.1 requires InnoDB Plugin with I_S tables)
--
-- mysql> SELECT * FROM x$innodb_lock_waits\G
-- *************************** 1. row ***************************
--                 wait_started: 2014-11-11 13:39:20
--                     wait_age: 00:00:07
--                wait_age_secs: 7
--                 locked_table: `db1`.`t1`
--                 locked_index: PRIMARY
--                  locked_type: RECORD
--               waiting_trx_id: 867158
--          waiting_trx_started: 2014-11-11 13:39:15
--              waiting_trx_age: 00:00:12
--      waiting_trx_rows_locked: 0
--    waiting_trx_rows_modified: 0
--                  waiting_pid: 3
--                waiting_query: UPDATE t1 SET val = val + 1 WHERE id = 2
--              waiting_lock_id: 867158:2363:3:3
--            waiting_lock_mode: X
--              blocking_trx_id: 867157
--                 blocking_pid: 4
--               blocking_query: UPDATE t1 SET val = val + 1 + SLEEP(10) WHERE id = 2
--             blocking_lock_id: 867157:2363:3:3
--           blocking_lock_mode: X
--         blocking_trx_started: 2014-11-11 13:39:11
--             blocking_trx_age: 00:00:16
--     blocking_trx_rows_locked: 1
--   blocking_trx_rows_modified: 1
--      sql_kill_blocking_query: KILL QUERY 4
-- sql_kill_blocking_connection: KILL 4
-- 1 row in set (0.01 sec)
--

CREATE OR REPLACE
  ALGORITHM = TEMPTABLE
  DEFINER = 'mysql.sys'@'localhost'
  SQL SECURITY INVOKER 
VIEW x$innodb_lock_waits (
  wait_started,
  wait_age,
  wait_age_secs,
  locked_table,
  locked_index,
  locked_type,
  waiting_trx_id,
  waiting_trx_started,
  waiting_trx_age,
  waiting_trx_rows_locked,
  waiting_trx_rows_modified,
  waiting_pid,
  waiting_query,
  waiting_lock_id,
  waiting_lock_mode,
  blocking_trx_id,
  blocking_pid,
  blocking_query,
  blocking_lock_id,
  blocking_lock_mode,
  blocking_trx_started,
  blocking_trx_age,
  blocking_trx_rows_locked,
  blocking_trx_rows_modified,
  sql_kill_blocking_query,
  sql_kill_blocking_connection
) AS
SELECT r.trx_wait_started AS wait_started,
       TIMEDIFF(NOW(), r.trx_wait_started) AS wait_age,
       TIMESTAMPDIFF(SECOND, r.trx_wait_started, NOW()) AS wait_age_secs,
       rl.lock_table AS locked_table,
       rl.lock_index AS locked_index,
       rl.lock_type AS locked_type,
       r.trx_id AS waiting_trx_id,
       r.trx_started as waiting_trx_started,
       TIMEDIFF(NOW(), r.trx_started) AS waiting_trx_age,
       r.trx_rows_locked AS waiting_trx_rows_locked,
       r.trx_rows_modified AS waiting_trx_rows_modified,
       r.trx_mysql_thread_id AS waiting_pid,
       r.trx_query AS waiting_query,
       rl.lock_id AS waiting_lock_id,
       rl.lock_mode AS waiting_lock_mode,
       b.trx_id AS blocking_trx_id,
       b.trx_mysql_thread_id AS blocking_pid,
       b.trx_query AS blocking_query,
       bl.lock_id AS blocking_lock_id,
       bl.lock_mode AS blocking_lock_mode,
       b.trx_started AS blocking_trx_started,
       TIMEDIFF(NOW(), b.trx_started) AS blocking_trx_age,
       b.trx_rows_locked AS blocking_trx_rows_locked,
       b.trx_rows_modified AS blocking_trx_rows_modified,
       CONCAT('KILL QUERY ', b.trx_mysql_thread_id) AS sql_kill_blocking_query,
       CONCAT('KILL ', b.trx_mysql_thread_id) AS sql_kill_blocking_connection
  FROM information_schema.innodb_lock_waits w
       INNER JOIN information_schema.innodb_trx b    ON b.trx_id = w.blocking_trx_id
       INNER JOIN information_schema.innodb_trx r    ON r.trx_id = w.requesting_trx_id
       INNER JOIN information_schema.innodb_locks bl ON bl.lock_id = w.blocking_lock_id
       INNER JOIN information_schema.innodb_locks rl ON rl.lock_id = w.requested_lock_id
 ORDER BY r.trx_wait_started;

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