简介

Part1: 写在最前

在很早之前，我写过一个MySQL生产库全库备份脚本，今天有同事问我是不是要再加一个-R参数来备份存储过程，理由的话是由于mysqldump --help中 关于存储过程的默认备份是false。

routines                          FALSE

MySQL生产库全库备份脚本

实战

Part1: 写在最前

我备份一般就三个参数

--single-transaction -A --master-data=2

分别是预防锁，全库备份和记录复制信息

有人问单库怎么恢复？可以移步

从MySQL全库备份中恢复某个库和某张表

Part2: 创建存储过程

[root@HE3 ~]# mysql -uroot -pEnter password: Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 7Server version: 5.6.25-log MySQL Community Server (GPL)Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> create database helei;Query OK, 1 row affected (0.02 sec)mysql> use helei;Database changedmysql> create table helei(    -> id int(10) unsigned NOT NULL AUTO_INCREMENT,    -> c1 int(10) NOT NULL DEFAULT '0',    -> c2 int(10) unsigned DEFAULT NULL,    -> c5 int(10) unsigned NOT NULL DEFAULT '0',    -> c3 timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,    -> c4 varchar(200) NOT NULL DEFAULT '',    -> PRIMARY KEY(id),    -> KEY idx_c1(c1),    -> KEY idx_c2(c2)    -> )ENGINE=InnoDB ;Query OK, 0 rows affected (0.02 sec)mysql> delimiter $$mysql> drop procedure if exists `×××ert_helei` $$and()*row_num),now(),repeat('su', floor(rand()*20)));set i = i+1; END while;end$$Query OK, 0 rows affected, 1 warning (0.00 sec)mysql> create procedure `×××ert_helei`(in row_num int )    -> begin    ->  declare i int  default 0;    ->  while i < row_num do    -> ×××ert into helei(c1, c2, c5,c3, c4) values( floor(rand()*row_num),floor(rand()*row_num),floor(rand()*row_num),now(),repeat('su', floor(rand()*20)));    -> set i = i+1;    ->  END while;    ->     -> end$$Query OK, 0 rows affected (0.00 sec)mysql>

Part3: 执行不同的备份脚本

参数分别是

--single-transaction -A --master-data=2

--single-transaction -A -R  --master-data=2

Part4: 对比SQL文件

可以发现加了-R的文件中记录了创建存储过程的SQL语句，没加-R的没有记录。

-- Dumping routines for database 'helei'--/*!50003 DROP PROCEDURE IF EXISTS `×××ert_helei` */;/*!50003 SET @saved_cs_client      = @@character_set_client */ ;/*!50003 SET @saved_cs_results     = @@character_set_results */ ;/*!50003 SET @saved_col_connection = @@collation_connection */ ;/*!50003 SET character_set_client  = utf8 */ ;/*!50003 SET character_set_results = utf8 */ ;/*!50003 SET collation_connection  = utf8_general_ci */ ;/*!50003 SET @saved_sql_mode       = @@sql_mode */ ;/*!50003 SET sql_mode              = 'STRICT_TRANS_TABLES,NO_ENGINE_SUBSTITUTION' */ ;DELIMITER ;;CREATE DEFINER=`root`@`localhost` PROCEDURE `×××ert_helei`(in row_num int )begin declare i int  default 0; while i < row_num do×××ert into helei(c1, c2, c5,c3, c4) values( floor(rand()*row_num),floor(rand()*row_num),floor(rand()*row_num),now(),repeat('su', floor(rand()*20)));set i = i+1; END while;end ;;DELIMITER ;/*!50003 SET sql_mode              = @saved_sql_mode */ ;/*!50003 SET character_set_client  = @saved_cs_client */ ;/*!50003 SET character_set_results = @saved_cs_results */ ;/*!50003 SET collation_connection  = @saved_col_connection */ ;

验证

Part1: 验证

清空linux环境，重装mysql，导入不带-R参数即不带创建存储过程SQL的备份文件

[root@HE3 ~]# mysql -uroot -p < Master_db_201612051722.sql Enter password: [root@HE3 ~]# mysql -uroot -pEnter password: Welcome to the MySQL monitor.  Commands end with ; or \g.Your MySQL connection id is 9Server version: 5.6.25-log MySQL Community Server (GPL)Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved.Oracle is a registered trademark of Oracle Corporation and/or itsaffiliates. Other names may be trademarks of their respectiveowners.Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.mysql> use helei;Reading table information for completion of table and column namesYou can turn off this feature to get a quicker startup with -ADatabase changedmysql> select * from helei;Empty set (0.00 sec)mysql> call ×××ert_helei(5);Query OK, 1 row affected (0.01 sec)mysql> select * from helei;+----+----+------+----+---------------------+------------------------------------+| id | c1 | c2   | c5 | c3                  | c4                                 |+----+----+------+----+---------------------+------------------------------------+|  1 |  1 |    2 |  0 | 2016-12-05 17:51:37 | sususususususususususu             ||  2 |  2 |    1 |  0 | 2016-12-05 17:51:37 | sususususususususususususususususu ||  3 |  4 |    1 |  3 | 2016-12-05 17:51:37 | sususususususususususu             ||  4 |  3 |    2 |  3 | 2016-12-05 17:51:37 | sususususususususususu             ||  5 |  0 |    2 |  4 | 2016-12-05 17:51:37 | sususususususususu                 |+----+----+------+----+---------------------+------------------------------------+5 rows in set (0.00 sec)mysql>

发现即便没有添加-R参数，也依然可以调用之前创建的存储过程。

——总结 ——

存储过程存储在mysql.proc表中，而笔者由于采用了-A全库备份的策略，即包含mysql库，所以存储过程也得以备份。-R参数一般用于单库备份或者多库备份。由于笔 者的水平有限，编写时间也很仓促，文中难免会出现一些错误或者不准确的地方，不妥之处恳请读者批评指正。