MySQL使用information_schema获取锁表信息

information_schema

Version >= 5.1

 SELECT
     r.trx_id waiting_trx_id,
     r.trx_mysql_thread_id waiting_thread,
     TIMESTAMPDIFF(
         SECOND,
         r.trx_wait_started,
         CURRENT_TIMESTAMP
     ) wait_time,
     r.trx_query waiting_query,
     l.lock_table waiting_table_lock,
     b.trx_id blocking_trx_id,
     b.trx_mysql_thread_id blocking_thread,
     SUBSTRING(
         p. HOST,
         1,
         INSTR(p. HOST, ':') - 1
     ) blocking_host,
     SUBSTRING(p. HOST, INSTR(p. HOST, ':') + 1) blocking_port,

 IF (p.COMMAND = 'Sleep', p.TIME, 0) idel_in_trx,
  b.trx_query blocking_query
 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 l ON w.requested_lock_id = l.lock_id
 LEFT JOIN information_schema. PROCESSLIST p ON p.ID = b.trx_mysql_thread_id
 ORDER BY
     wait_time DESC;