How to correctly close the connections and resources of the MySQL connection pool in a Shell script and handle connection exceptions?
MySQL is a popular relational database management system that is widely used in various applications. When using MySQL, it is a common practice to use a connection pool to manage database connections, which can improve the efficiency of database connection usage. When using the MySQL connection pool in a Shell script, you need to correctly close the connection and release resources, and also handle connection exceptions to ensure the stability and security of the program.
The following are several steps on how to correctly close the connections and resources of the MySQL connection pool and handle connection exceptions in a Shell script:
The following is a sample Shell script that shows how to correctly close the connections and resources of the MySQL connection pool and handle connection exceptions in the Shell script:
#!/bin/bash # 设置连接参数 HOST="localhost" PORT="3306" USER="root" PASSWORD="password" DATABASE="mydb" # 获取连接 mysql -h $HOST -P $PORT -u $USER -p$PASSWORD $DATABASE <<EOF # 执行SQL语句 try { # SQL操作 } catch (Exception $e) { # 处理连接异常 echo "连接异常:$e" # 记录日志 echo "连接异常:$e" >> error.log # 错误处理 # 重试连接或回滚事务等 } # 关闭连接 QUIT EOF # 处理其他业务逻辑
In this example, We used the MySQL command line tool to obtain the connection and perform the required SQL operations. In the try-catch block, we catch the connection exception and handle it accordingly. Finally, other operations can be performed within other business logic of the script.
Through the above steps, we can correctly close the connections and resources of the MySQL connection pool in the Shell script and handle the connection exception. This can ensure the normal use of the database connection and improve the stability and security of the program.
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