MySQL锁读取InnoDB的单行

Question

需要帮助锁定阅读（选择）行

第二秒1：航站楼A

START TRANSACTION;
SELECT * FROM tbl_processor WHERE id=1 FOR UPDATE; /*Or using this statement : SELECT * FROM tbl_processor WHERE id=1 LOCK IN READ MODE; */
UPDATE tbl_processor SET content='Updated content';  #Original content was content='Original content'   
SELECT SLEEP(10); #Just to sleep for testing purpose
COMMIT;

第二点2：航站楼B；

SELECT * FROM tbl_processor WHERE id=1;
#This will return result immediately with content='Original content'
-----> This is my problem... I do not want this statement getting not updated content. It should wait until the Terminal A process completed

Answer 1

更改第二个事务（终端B）以获得共享锁：

SELECT * FROM tbl_processor WHERE id=1 LOCK IN SHARE MODE;

我建议您在此处查看《 MySQL参考手册》中的相关信息：

https://dev.mysql.com/doc/refman/5.7/en/innodb-locking-reads.html