MySQL找出未提交事務(wù)的SQL實(shí)例淺析

mysql> create table kkk(id int , name varchar(12));
Query OK, 0 rows affected (0.34 sec)
 
mysql> insert into kkk values(1, 'kerry');
Query OK, 1 row affected (0.01 sec)
 
mysql> insert into kkk values(2, 'jerry');
Query OK, 1 row affected (0.00 sec)
 
mysql> insert into kkk values(3, 'ken');
Query OK, 1 row affected (0.00 sec)
 
mysql> 
 
mysql> create table t(a varchar(10));
Query OK, 0 rows affected (0.47 sec)
 
mysql> insert into t values('test');
Query OK, 1 row affected (0.00 sec)

mysql> select connection_id() from dual;
+-----------------+
| connection_id() |
+-----------------+
|  38 |
+-----------------+
1 row in set (0.00 sec)
 
mysql> set session autocommit=0;
Query OK, 0 rows affected (0.00 sec)
 
mysql> delete from kkk where id =1;
Query OK, 1 row affected (0.00 sec)
 
mysql> 

mysql> SELECT t.trx_mysql_thread_id
 -> ,t.trx_id
 -> ,t.trx_state
 -> ,t.trx_tables_in_use
 -> ,t.trx_tables_locked
 -> ,t.trx_query
 -> ,t.trx_rows_locked 
 -> ,t.trx_rows_modified
 -> ,t.trx_lock_structs
 -> ,t.trx_started
 -> ,t.trx_isolation_level
 -> ,p.time 
 -> ,p.user
 -> ,p.host
 -> ,p.db
 -> ,p.command
 -> FROM information_schema.innodb_trx t 
 -> INNER JOIN information_schema.processlist p 
 ->  ON t.trx_mysql_thread_id = p.id 
 -> WHERE t.trx_state = 'RUNNING' 
 -> AND p.time > 4 
 -> AND p.command = 'Sleep'\G 
*************************** 1. row ***************************
trx_mysql_thread_id: 38
  trx_id: 7981581
  trx_state: RUNNING
 trx_tables_in_use: 0
 trx_tables_locked: 1
  trx_query: NULL
 trx_rows_locked: 4
 trx_rows_modified: 1
 trx_lock_structs: 2
 trx_started: 2020-12-03 15:39:37
trx_isolation_level: REPEATABLE READ
  time: 23
  user: root
  host: localhost
   db: MyDB
  command: Sleep
1 row in set (0.00 sec)

SELECT t.trx_mysql_thread_id   AS connection_id
 ,t.trx_id     AS trx_id  
 ,t.trx_state     AS trx_state 
 ,t.trx_started    AS trx_started 
 ,TIMESTAMPDIFF(SECOND,t.trx_started, now()) AS "trx_run_time(s)" 
 ,t.trx_requested_lock_id   AS trx_requested_lock_id
 ,t.trx_operation_state   AS trx_operation_state
 ,t.trx_tables_in_use    AS trx_tables_in_use
 ,t.trx_tables_locked    AS trx_tables_locked
 ,t.trx_rows_locked    AS trx_rows_locked
 ,t.trx_isolation_level   AS trx_isolation_level
 ,t.trx_is_read_only    AS trx_is_read_only
 ,t.trx_autocommit_non_locking   AS trx_autocommit_non_locking
 ,e.event_name     AS event_name
 ,e.timer_wait / 1000000000000   AS timer_wait
 ,e.sql_text 
FROM information_schema.innodb_trx t, 
 performance_schema.events_statements_current e, 
 performance_schema.threads c 
WHERE t.trx_mysql_thread_id = c.processlist_id 
 AND e.thread_id = c.thread_id\G;

mysql> set session autocommit=0;
Query OK, 0 rows affected (0.01 sec)
 
mysql> delete from kkk where id =1;
Query OK, 1 row affected (0.00 sec)
 
mysql> select * from t;
+------+
| a |
+------+
| test |
+------+
1 row in set (0.00 sec)
 
mysql> 

mysql> SELECT t.trx_mysql_thread_id   AS connection_id
 -> ,t.trx_id     AS trx_id  
 -> ,t.trx_state     AS trx_state 
 -> ,t.trx_started    AS trx_started 
 -> ,TIMESTAMPDIFF(SECOND,t.trx_started, now()) AS "trx_run_time(s)" 
 -> ,t.trx_requested_lock_id   AS trx_requested_lock_id
 -> ,t.trx_operation_state   AS trx_operation_state
 -> ,t.trx_tables_in_use    AS trx_tables_in_use
 -> ,t.trx_tables_locked    AS trx_tables_locked
 -> ,t.trx_rows_locked    AS trx_rows_locked
 -> ,t.trx_isolation_level   AS trx_isolation_level
 -> ,t.trx_is_read_only    AS trx_is_read_only
 -> ,t.trx_autocommit_non_locking   AS trx_autocommit_non_locking
 -> ,e.event_name     AS event_name
 -> ,e.timer_wait / 1000000000000   AS timer_wait
 -> ,e.sql_text 
 -> FROM information_schema.innodb_trx t, 
 -> performance_schema.events_statements_current e, 
 -> performance_schema.threads c 
 -> WHERE t.trx_mysql_thread_id = c.processlist_id 
 -> AND e.thread_id = c.thread_id\G; 
*************************** 1. row ***************************
  connection_id: 38
   trx_id: 7981581
   trx_state: RUNNING
  trx_started: 2020-12-03 15:39:37
  trx_run_time(s): 237
 trx_requested_lock_id: NULL
 trx_operation_state: NULL
  trx_tables_in_use: 0
  trx_tables_locked: 1
  trx_rows_locked: 4
 trx_isolation_level: REPEATABLE READ
  trx_is_read_only: 0
trx_autocommit_non_locking: 0
  event_name: statement/sql/select
  timer_wait: 0.0002
   sql_text: select * from t
1 row in set (0.00 sec)
 
ERROR: 
No query specified

SELECT trx.trx_mysql_thread_id AS processlist_id
 ,sc.thread_id
 ,trx.trx_started
 ,TO_SECONDS(now())-TO_SECONDS(trx_started) AS trx_last_time 
 ,pc1.user
 ,pc1.host
 ,pc1.db
 ,sc.SQL_TEXT AS current_sql_text
 ,sh.history_sql_test
FROM INFORMATION_SCHEMA.INNODB_TRX trx
INNER JOIN INFORMATION_SCHEMA.processlist pc1 ON trx.trx_mysql_thread_id=pc1.id
INNER JOIN performance_schema.threads th on th.processlist_id = trx.trx_mysql_thread_id
INNER JOIN performance_schema.events_statements_current sc ON sc.THREAD_ID = th.THREAD_ID
INNER JOIN (
  SELECT thread_id AS thread_id, GROUP_CONCAT(SQL_TEXT SEPARATOR ';') AS history_sql_test
  FROM performance_schema.events_statements_history 
  GROUP BY thread_id 
  ) sh ON sh.thread_id = th.thread_id
WHERE trx_mysql_thread_id != connection_id()
 AND TO_SECONDS(now())-TO_SECONDS(trx_started) >= 0 ;

SELECT @dt_ts:=UNIX_TIMESTAMP(NOW());
SELECT 
 @dt_timer:=MAX(sh.TIMER_START)
FROM performance_schema.threads AS t
INNER JOIN performance_schema.events_statements_history AS sh
ON t.`THREAD_ID`=sh.`THREAD_ID`
WHERE t.PROCESSLIST_ID=CONNECTION_ID();
 
 
SELECT sh.current_schema  AS database_name
 ,t.thread_id
 ,it.trx_mysql_thread_id  AS connection_id
 ,it.trx_id
 ,sh.event_id
 ,it.trx_state
 ,REPLACE(REPLACE(REPLACE(sh.`SQL_TEXT`,'\n',' '),'\r',' '),'\t',' ') AS executed_sql
 ,it.trx_started
 ,FROM_UNIXTIME(@dt_ts-CAST((@dt_timer-sh.TIMER_START)/1000000000000 AS SIGNED)) AS start_time
 ,FROM_UNIXTIME(@dt_ts-CAST((@dt_timer-sh.TIMER_END) /1000000000000 AS SIGNED)) AS end_time
 ,(sh.TIMER_END-sh.TIMER_START)/1000000000000 AS used_seconds
 ,sh.TIMER_WAIT/1000000000000 AS wait_seconds
 ,sh.LOCK_TIME/1000000000000 AS lock_seconds
 ,sh.ROWS_AFFECTED AS affected_rows
 ,sh.ROWS_SENT AS send_rows
FROM performance_schema.threads AS t
INNER JOIN information_schema.innodb_trx it ON it.trx_mysql_thread_id = t.processlist_id 
INNER JOIN performance_schema.events_statements_history AS sh
 ON t.`THREAD_ID`=sh.`THREAD_ID`
WHERE t.PROCESSLIST_ID IN (
  SELECT 
   p.ID AS conn_id
  FROM `information_schema`.`INNODB_TRX` t
  INNER JOIN `information_schema`.`PROCESSLIST` p
   ON t.trx_mysql_thread_id=p.id
  WHERE t.trx_state='RUNNING'
   AND p.COMMAND='Sleep'
   AND p.TIME>2
  )
AND sh.TIMER_START@dt_timer
AND FROM_UNIXTIME(@dt_ts-CAST((@dt_timer-sh.TIMER_START)/1000000000000 AS SIGNED)) >=it.trx_started
ORDER BY it.trx_id ASC, sh.TIMER_START ASC;

SELECT sh.current_schema  AS database_name
 ,t.thread_id
 ,it.trx_mysql_thread_id AS connection_id
 ,it.trx_id
 ,sh.event_id
 ,it.trx_state
 ,REPLACE(REPLACE(REPLACE(sh.`SQL_TEXT`,'\n',' '),'\r',' '),'\t',' ') AS executed_sql
 ,it.trx_started
 ,DATE_SUB(NOW(), INTERVAL (SELECT VARIABLE_VALUE FROM performance_schema.global_status WHERE VARIABLE_NAME='UPTIME') - sh.TIMER_START*10e-13 second) AS start_time
 ,DATE_SUB(NOW(), INTERVAL (SELECT VARIABLE_VALUE FROM performance_schema.global_status WHERE VARIABLE_NAME='UPTIME') - sh.TIMER_END*10e-13 second) AS end_time
 ,(sh.TIMER_END-sh.TIMER_START)/1000000000000 AS used_seconds
 ,sh.TIMER_WAIT/1000000000000 AS wait_seconds
 ,sh.LOCK_TIME/1000000000000 AS lock_seconds
 ,sh.ROWS_AFFECTED AS affected_rows
 ,sh.ROWS_SENT AS send_rows
FROM performance_schema.threads AS t
INNER JOIN information_schema.innodb_trx it ON it.trx_mysql_thread_id = t.processlist_id 
INNER JOIN performance_schema.events_statements_history AS sh
 ON t.`THREAD_ID`=sh.`THREAD_ID`
WHERE t.PROCESSLIST_ID IN (
  SELECT 
   p.ID AS conn_id
  FROM `information_schema`.`INNODB_TRX` t
  INNER JOIN `information_schema`.`PROCESSLIST` p
   ON t.trx_mysql_thread_id=p.id
  WHERE t.trx_state='RUNNING'
   AND p.COMMAND='Sleep'
   AND p.TIME>2
  )
AND sh.TIMER_START(SELECT VARIABLE_VALUE*1000000000000 FROM performance_schema.global_status WHERE VARIABLE_NAME='UPTIME')
AND DATE_SUB(NOW(), INTERVAL (SELECT VARIABLE_VALUE FROM performance_schema.global_status WHERE VARIABLE_NAME='UPTIME') - sh.TIMER_START*10e-13 second) >=it.trx_started
ORDER BY it.trx_id ASC, sh.TIMER_START ASC;