内容简介:MySQL使用UDF调用shell脚本
前言
在最近的项目中,由于需要使用 MySQL 的UDF(user defined function),这个特性从未使用过,而且个人觉得这个特性以后应该会经常使用,所以写下博文,记录和分享这个特性的用法。
UDF是mysql的一个拓展接口,UDF(Userdefined function)可翻译为用户自定义函数,这个是用来拓展Mysql的技术手段。
- 官方介绍请点击
- 有关MySQL5.7在CentOS7.0上的安装配置请参考 http://www.linuxidc.com/Linux/2017-05/144363.htm
1. 下载
https://github.com/mysqludf/lib_mysqludf_sys
2. 安装
#安装mysql的两个依赖包 [root@dtadmin apollo ~]# rpm -ivh mysql-community-libs-compat-5.7.17-1.el7.x86_64.rpm [root@dtadmin apollo ~]# rpm -ivh mysql-community-devel-5.7.17-1.el7.x86_64.rpm #安装gcc gcc-c++编译器 [root@dtadmin apollo ~]# yum install gcc gcc-c++
3. 解压
[root@dtadmin apollo ~]# unzip lib_mysqludf_sys-master.zip
4. 执行命令
#进入目录 [root@dtadmin apollo ~]# cd lib_mysqludf_sys-master # 在目录lib_mysqludf_sys-master执行: [root@dtadmin lib_mysqludf_sys-master ~]# gcc -DMYSQL_DYNAMIC_PLUGIN -fPIC -Wall -I/usr/include/mysql -I. -shared lib_mysqludf_sys.c -o lib_mysqludf_sys.so
5. 把编译后的 lib_mysqludf_sys.so 拷到 /usr/lib64/mysql/plugin/
[root@dtadmin lib_mysqludf_sys-master ~]# cp lib_mysqludf_sys.so /usr/lib64/mysql/plugin/
6. 在mysql中执行
[root@dtadmin lib_mysqludf_sys-master ~]# mysql -u root -p --default-character-set=utf8
执行以下脚本:
Drop FUNCTION IF EXISTS lib_mysqludf_sys_info; Drop FUNCTION IF EXISTS sys_get; Drop FUNCTION IF EXISTS sys_set; Drop FUNCTION IF EXISTS sys_exec; Drop FUNCTION IF EXISTS sys_eval; Create FUNCTION lib_mysqludf_sys_info RETURNS string SONAME 'lib_mysqludf_sys.so'; Create FUNCTION sys_get RETURNS string SONAME 'lib_mysqludf_sys.so'; Create FUNCTION sys_set RETURNS int SONAME 'lib_mysqludf_sys.so'; Create FUNCTION sys_exec RETURNS int SONAME 'lib_mysqludf_sys.so'; Create FUNCTION sys_eval RETURNS string SONAME 'lib_mysqludf_sys.so';
7.在/var/lib/mysql-files目录下新建脚本
[root@dtadmin lib_mysqludf_sys-master ~]# cd /var/lib/mysql-files [root@dtadmin mysql-files ~]# load_data_infile.sh
脚本内容如下:
#!/bin/bash HOSTNAME="192.168.56.101" #mysql hostname PORT="3306" #mysql port USERNAME="root" # the username for DBNAME PASSWORD="Love88me=-.," # the password for USERNAME and DBNAME DBNAME="subs" #DBNAME cmd_load_data_infile="LOAD DATA INFILE '$1' REPLACE INTO TABLE $2 FIELDS TERMINATED BY '\t\t\t';" mysql -h${HOSTNAME} -P${PORT} -u${USERNAME} -p${PASSWORD} -D${DBNAME} -e "${cmd_load_data_infile}"
8.改变文件的执行权限
[root@dtadmin mysql-files ~]# chmod u+x load_data_infile.sh
9.示例,定时备份数据表数据到另一张表
9.1.创建存储过程
use DBNAME; drop table if exists sbux_nc_request_hist; drop table if exists sbux_nc_edm_message_hist; drop table if exists sbux_nc_mail_message_hist; drop table if exists sbux_nc_push_message_hist; drop table if exists sbux_nc_sms_message_hist; drop table if exists sbux_nc_wechat_message_hist; drop table if exists sbux_nc_sys_log_hist; drop table if exists sbux_nc_sms_log_hist; drop table if exists sbux_nc_push_log_hist; drop table if exists sbux_nc_wechat_log_hist; drop table if exists sbux_nc_edm_log_hist; drop table if exists sbux_nc_mail_log_hist; create table sbux_nc_request_hist like sbux_nc_request; create table sbux_nc_edm_message_hist like sbux_nc_edm_message; create table sbux_nc_mail_message_hist like sbux_nc_mail_message; create table sbux_nc_push_message_hist like sbux_nc_push_message; create table sbux_nc_sms_message_hist like sbux_nc_sms_message; create table sbux_nc_wechat_message_hist like sbux_nc_wechat_message; create table sbux_nc_sys_log_hist like sbux_nc_sys_log; create table sbux_nc_edm_log_hist like sbux_nc_edm_log; create table sbux_nc_mail_log_hist like sbux_nc_mail_log; create table sbux_nc_push_log_hist like sbux_nc_push_log; create table sbux_nc_sms_log_hist like sbux_nc_sms_log; create table sbux_nc_wechat_log_hist like sbux_nc_wechat_log; drop procedure if exists sbux_nc_data_migrate_p; delimiter // ; CREATE PROCEDURE sbux_nc_data_migrate_p() BEGIN DECLARE v_same_date_last_period date; # 上月同一天 DECLARE v_max_hist_date date; # 历史表中的最大时间 DECLARE v_current_date date; # 当前日期 DECLARE v_table_name varchar(50); # 变量,用来存储游标遍历中的要备份表的表名 DECLARE v_engine varchar(50); # 表的存储引擎 DECLARE v_create_options varchar(50); # 创建表的选项(是否是分区表) DECLARE FLAG int default 0; # 游标的标记 DECLARE v_auto_increment int default 0; # 设置下个自增长列 DECLARE v_file_path varchar(200) default '/var/lib/mysql-files/'; # MySQL中的存储datafile的路径 DECLARE v_separator varchar(200) default " fields terminated by '\\t\\t\\t'"; # 导出文件的分隔符 DECLARE v_file varchar(500); # 导出文件的全名(路径+文件名) DECLARE v_result int default 0; # 执行文件的结果标记 DECLARE v_flag int DEFAULT 0; # 执行 shell 脚本的标记 # 声明游标:查询出要做数据备份的表的列表 DECLARE cur_table_list CURSOR FOR SELECT table_name, engine, create_options FROM information_schema.TABLES WHERE table_schema='DBMAME' AND table_name in ( 'sbux_nc_request' , 'sbux_nc_edm_message', 'sbux_nc_mail_message', 'sbux_nc_push_message', 'sbux_nc_sms_message', 'sbux_nc_wechat_message', 'sbux_nc_sys_log', 'sbux_nc_edm_log', 'sbux_nc_mail_log', 'sbux_nc_push_log', 'sbux_nc_sms_log', 'sbux_nc_wechat_log' ); DECLARE CONTINUE HANDLER FOR NOT FOUND SET flag=1; #设置游标退出标记 SELECT date_sub(current_date(),interval 1 month) INTO v_same_date_last_period; # 查询上月同一天的日期 SELECT current_date() INTO v_current_date; # 查询当前日期 # 清空目录下面的文件 select sys_exec('rm -rf /var/lib/mysql-files/sbux_nc_*') into v_result; # 遍历游标 OPEN cur_table_list; FETCH cur_table_list INTO v_table_name,v_engine,v_create_options; WHILE(flag<>1) DO # 存储原表中所有数据到文件 SET @stmt = CONCAT('select * into outfile ',"'",v_file_path, v_table_name,'_hist.dat', "'",' ', v_separator, ' from ',v_table_name,';'); PREPARE stmt FROM @stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt; # 设置要备份表的时间段 SET @condition = case v_table_name when 'sbux_nc_request' then concat('where request_time between ',"'",v_same_date_last_period,"'", ' and ',"'", v_current_date,"'") when 'sbux_nc_edm_message' then concat('where send_time between ',"'",v_same_date_last_period,"'", ' and ',"'", v_current_date,"'") when 'sbux_nc_mail_message' then concat('where send_time between ',"'",v_same_date_last_period, "'",' and ',"'", v_current_date,"'") when 'sbux_nc_push_message' then concat('where send_time between ',"'",v_same_date_last_period, "'",' and ',"'", v_current_date,"'") when 'sbux_nc_sms_message' then concat('where send_time between ',"'",v_same_date_last_period, "'",' and ',"'", v_current_date,"'") when 'sbux_nc_wechat_message' then concat('where send_time between ',"'",v_same_date_last_period, "'",' and ',"'", v_current_date,"'") when 'sbux_nc_sys_log' then concat('where log_time between ',"'",v_same_date_last_period,"'", ' and ',"'", v_current_date,"'") when 'sbux_nc_edm_log' then concat('where log_time between ',UNIX_TIMESTAMP(v_same_date_last_period), ' and ', UNIX_TIMESTAMP(v_current_date)) when 'sbux_nc_mail_log' then concat('where log_time between ',UNIX_TIMESTAMP(v_same_date_last_period), ' and ', UNIX_TIMESTAMP(v_current_date)) when 'sbux_nc_push_log' then concat('where log_time between ',UNIX_TIMESTAMP(v_same_date_last_period), ' and ', UNIX_TIMESTAMP(v_current_date)) when 'sbux_nc_sms_log' then concat('where log_time between ',UNIX_TIMESTAMP(v_same_date_last_period), ' and ', UNIX_TIMESTAMP(v_current_date)) when 'sbux_nc_wechat_log' then concat('where log_time between ',UNIX_TIMESTAMP(v_same_date_last_period), ' and ', UNIX_TIMESTAMP(v_current_date)) else NULL end; # 保存最近一个月的数据到文件 SET @stmt = CONCAT('select * into outfile ',"'", v_file_path, v_table_name,'.dat ', "'", ' ', v_separator, ' from ',v_table_name, ' ', @condition,';'); PREPARE stmt FROM @stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt; #获取表的最大增增长列并 select auto_increment into v_auto_increment from information_schema.TABLES where table_schema='starbucks' and table_name=v_table_name; # 删除原来数据 SET @stmt = CONCAT('truncate table ',v_table_name,';'); PREPARE stmt FROM @stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt; #设置下一个增量值 SET @stmt = CONCAT('alter table ',v_table_name,' auto_increment=',v_auto_increment,';'); PREPARE stmt FROM @stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt; # 加载数据到历史数据表中 # SET @stmt = CONCAT('LOAD DATA INFILE ',"'", v_file_path, v_table_name,'_hist.dat', "'", ' INTO TABLE ', v_table_name,'_hist',' ', v_separator); # PREPARE stmt FROM @stmt; # EXECUTE stmt; # DEALLOCATE PREPARE stmt; # 设置之前导出的表的数据文件(路径+文件名) SET v_file = concat(v_file_path,v_table_name,'_hist.dat'); # 执行mysql UFF函数调用shell脚本把数据导入到历史表中 set @v_load_str = concat('sh /var/lib/mysql-files/load_data_infile.sh',' ',v_file,' ',CONCAT(v_table_name,'_hist')); select sys_exec(@v_load_str) into v_flag; # 把最近一个月的数据保存到原表中 # SET @stmt = CONCAT('LOAD DATA INFILE ',"'", v_file_path, v_table_name,'.dat ',"'",' INTO TABLE ',v_table_name,' ', v_separator); # PREPARE stmt FROM @stmt; # EXECUTE stmt; # DEALLOCATE PREPARE stmt; # 设置之前导出的表的近一个月数据文件(路径+文件名) SET v_file = concat(v_file_path,v_table_name,'.dat'); # 执行mysql UFF函数调用shell脚本把数据导入到原表中 set @v_load_str = concat('sh /var/lib/mysql-files/load_data_infile.sh',' ',v_file,' ',v_table_name); select sys_exec(@v_load_str) into v_flag; # 收集(分析)表的数据 SET @stmt = CONCAT('analyze table ',v_table_name,';'); PREPARE stmt FROM @stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt; FETCH cur_table_list INTO v_table_name,v_engine,v_create_options; END WHILE; CLOSE cur_table_list; END; // delimiter ; //
9.2.新建event,用来定时执行
/*======================================================================================== */ -- Name: sbux_nc_auto_migrate_evt -- Purpose: 定时任务,自动备份表数据 -- Interval: Monthly -- AT: 每个月1号凌晨2点 -- Invoker: sbux_nc_data_migrate_p /*======================================================================================== */ set GLOBAL event_scheduler=1; # MySQL启动event scheduler drop event if exists sbux_nc_auto_migrate_evt; # 在创建event scheduler前删除已存在的同名的event scheduler. delimiter // ; create event sbux_nc_auto_migrate_evt ON SCHEDULE EVERY 1 DAY STARTS date_add(date(curdate() + 1),interval 2 hour) #MONTH STARTS DATE_ADD(DATE_ADD(DATE_SUB(CURDATE(),INTERVAL DAY(CURDATE())-1 DAY), INTERVAL 1 MONTH),INTERVAL 2 HOUR) -- 每个月的一号凌晨2点 ON completion preserve ENABLE DO call sbux_nc_data_migrate_p(); // delimiter ; //
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Design and Analysis of Distributed Algorithms (Wiley Series on P
Nicola Santoro / Wiley-Interscience / 2006-10-27 / USD 140.95
This text is based on a simple and fully reactive computational model that allows for intuitive comprehension and logical designs. The principles and techniques presented can be applied to any distrib......一起来看看 《Design and Analysis of Distributed Algorithms (Wiley Series on P》 这本书的介绍吧!