当mysql数据库中的表被我锁上几个后,为什么用这两个sql语句查不出被锁的表和被锁的个数,大神们有没有什么好的sql语句啊,求助!!!
SELECT
p2.`HOST` 被阻塞方host,
p2.`USER` 被阻塞方用户,
r.trx_id 被阻塞方事务id,
r.trx_mysql_thread_id 被阻塞方线程号,
TIMESTAMPDIFF(
SECOND,
r.trx_wait_started,
CURRENT_TIMESTAMP
) 等待时间,
r.trx_query 被阻塞的查询,
l.lock_table 阻塞方锁住的表,
m.`lock_mode` 被阻塞方的锁模式,
m.`lock_type` "被阻塞方的锁类型(表锁还是行锁)",
m.`lock_index` 被阻塞方锁住的索引,
m.`lock_space` 被阻塞方锁对象的space_id,
m.lock_page 被阻塞方事务锁定页的数量,
m.lock_rec 被阻塞方事务锁定行的数量,
m.lock_data 被阻塞方事务锁定记录的主键值,
p.`HOST` 阻塞方主机,
p.`USER` 阻塞方用户,
b.trx_id 阻塞方事务id,
b.trx_mysql_thread_id 阻塞方线程号,
b.trx_query 阻塞方查询,
l.`lock_mode` 阻塞方的锁模式,
l.`lock_type` "阻塞方的锁类型(表锁还是行锁)",
l.`lock_index` 阻塞方锁住的索引,
l.`lock_space` 阻塞方锁对象的space_id,
l.lock_page 阻塞方事务锁定页的数量,
l.lock_rec 阻塞方事务锁定行的数量,
l.lock_data 阻塞方事务锁定记录的主键值,
IF (
p.COMMAND = 'Sleep',
CONCAT(p.TIME, ' 秒'),
0
) 阻塞方事务空闲的时间
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.blocking_lock_id = l.lock_id
AND l.`lock_trx_id` = b.`trx_id`
INNER JOIN information_schema.INNODB_LOCKS m
ON m.`lock_id` = w.`requested_lock_id`
AND m.`lock_trx_id` = r.`trx_id`
INNER JOIN information_schema.PROCESSLIST p
ON p.ID = b.trx_mysql_thread_id
INNER JOIN information_schema.PROCESSLIST p2
ON p2.ID = r.trx_mysql_thread_id;
SELECT
r.trx_id waiting_trx_id,
r.trx_mysql_thread_Id waiting_thread,
r.trx_query waiting_query,
b.trx_id blocking_trx_id,
b.trx_mysql_thread_id blocking_thread,
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;