MySQL 9.1 Reference Manual / ... / Delete Tables 22.3.4.4 Delete Tables You can use the delete() method to remove some or all records from a table in a database. The X DevAPI provides additional methods to use with the delete()
mysql tables in use 1, locked 1 LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s) MySQL thread id 363, OS thread handle 0x7f61ab1c7700, query id 2804 localhost msandbox updating delete from t where c1=8 --- TRX HAS BEEN WAITING 12 SEC FOR THIS LOCK TO BE GRANTED: R...
MySQL 8.0 Reference Manual / ... / Delete Tables 22.3.4.4 Delete Tables You can use the delete() method to remove some or all records from a table in a database. The X DevAPI provides additional methods to use with the delete()
1.查询是否锁表 show OPEN TABLES where In_use > 0; 2.查询进程(如果您有SUPER权限,您可以看到所有线程。否则,您只能看到您自己的线程) show processlist 3.杀死进程id(就是上面命令的id列) kill id 第二种 1.查看当前的事务 SELECT * FROM INFORMATION_SCHEMA.INNODB_TRX; 2.查看当前锁定的事务 SELECT *...
show tables; 1. 创建数据表 create [temporary]table[if not exists] 表名 ( 列名1 数据类型[列级别约束条件][默认值][auto_increment], 列名2 数据类型[列级别约束条件][默认值][auto_increment], …… [表级别约束条件] ); 1. 2. 3.
mysql tables in use 1, locked 1 LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s) MySQL thread id 3525577, OS thread handle 0x7f896cc4b700, query id 780039657 localhost root updating delete from ty where a=5 *** (1) WAITING FOR THIS LOCK TO BE GRANTED: ...
30:15trx_requested_lock_id:NULLtrx_wait_started:NULLtrx_weight:28257129trx_mysql_thread_id:179422242trx_query:updatexxxxtrx_operation_state:rollbacktrx_tables_in_use:1trx_tables_locked:1trx_lock_structs:7764183trx_lock_memory_bytes:999306792trx_rows_locked:117272180# 此事务锁定的大致数量或行数。
sess2 mysql >update t set c=6 where a=6 and b=6 and c=3; sess1 mysql >insert into t(a,b,c) values(3,3,5); --产生锁等待 insert (3,3,5) 申请lock S 被sess2 delete 持有的Lock X 行锁阻塞, show engine innodb status 并没有完整的显示 该lock S 是什么锁。我们继续测试。
mysql tables in use 1, locked 1 LOCK WAIT 2 lock struct(s), heap size 360, 1 row lock(s) MySQL thread id 363, OS thread handle 0x7f61ab1c7700, query id 2842 localhost msandbox updating delete from tu where c1=8 --- TRX HAS BEEN WAITING 2 SEC FOR THIS LOCK TO BE GRANTED:...
B.TYPE AS INDEX_TYPE FROM INNODB_SYS_TABLES A LEFT JOIN INNODB_SYS_INDEXES B ON A.TABLE_ID =B.TABLE_ID WHERE A.NAME = 'test/user1'; +---+---+---+---+---+---+---+---+---+---+ | TBL_SPACEID | TABLE_ID | TABLE_NAME | FILE_FORMAT | ROW_FORMAT | SPACE_TYPE |...