尝试使用 SELECT...FOR UPDATE in MySql 时出错

Question

我一直在尝试执行这一行命令：

START TRANSACTION; SELECT * FROM users where uid = 1 FOR UPDATE

在 phpMyAdmin 中。当我这样做时它抛出一个错误：

SQL query:

SELECT * FROM users where uid = 1 FOR UPDATE LIMIT 0, 25

MySQL said:

You have an error in your SQL syntax; check the manual that corresponds to your MariaDB server version for the right syntax to use near 'LIMIT 0, 25' at line 1

我想做的是在执行更新查询时实现独占记录锁定。

Answer 1

根据 https://dev.mysql.com/doc/refman/8.0/en/select.html，LIMIT 需要在 FOR UPDATE 之前出现。因此，将您的查询更改为以下内容应该可以避免此错误：

START TRANSACTION; SELECT * FROM users WHERE uid = 1 LIMIT 0, 25 FOR UPDATE;

尝试使用 SELECT...FOR UPDATE in MySql 时出错

Error when trying to use SELECT...FOR UPDATE in MySql

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