Mysql的鎖讀對於InnoDB

Question

單行需要幫助鎖定讀取（選擇）行

在第二1：終端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; 

在第二2：終端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

更改第二個交易（B端），以獲得一個共享鎖：

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

我建議您查看MySQL參考手冊這裏的相關信息：

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