本篇内容介绍了“怎么迁移mysql数据库中的表”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
作为写脚本的，这次的重点在于实现了类似于其他语言的logging模块的输出功能。感觉还是蛮有用的，简单直观。
输出log如下所示：
2017-03-31 16:26:57 --- INFO --- You choose the name of the table below: 2017-03-31 16:26:57 --- INFO --- 2016_06_24_record_base_log 2017-03-31 16:26:57 --- INFO --- 2016_06_16_record_base_log 2017-03-31 16:26:57 --- INFO --- table insert statements 2016_06_24_record_base_log backuping 2017-03-31 16:26:57 --- INFO --- table struct 2016_06_24_record_base_log backuping 2017-03-31 16:26:57 --- INFO --- table insert statements 2016_06_16_record_base_log backuping 2017-03-31 16:26:57 --- INFO --- table struct 2016_06_16_record_base_log backuping 2017-03-31 16:26:57 --- INFO --- append the ENGINE=InnoDB --> DATA DIRECTORY\=\'\/data2\/db\/mysql\'/ to struct/2016_06_24_record_base_log.sql 2017-03-31 16:26:57 --- INFO --- append the ENGINE=InnoDB --> DATA DIRECTORY\=\'\/data2\/db\/mysql\'/ to struct/2016_06_16_record_base_log.sql 2017-03-31 16:26:57 --- INFO --- There is no back up the table 2017-03-31 16:26:57 --- INFO --- The import table structure 2017-03-31 16:26:57 --- INFO --- Insert data to the table 2017-03-31 16:26:57 --- INFO --- There is no back up the table 2017-03-31 16:26:57 --- INFO --- The import table structure 2017-03-31 16:26:57 --- INFO --- Insert data to the table 2017-03-31 16:26:57 --- INFO --- Successfully completed the operation !shell脚本如下所示,此脚本在centos系统测试通过：
#!/bin/bash mysqluser='root' mysqlpass='dbpassword' mysqlhost='127.0.0.1' mysqldb='dbname' mysqlpath='/usr/local/mysql/bin' mysqlport=3306 datetimes=`date "+%Y-%m-%d %H:%M:%S"` datetimes2=`date "+%Y%m%d%H%M"` datetimes3=`date "+%Y%m%d%H%M%S"` backupdir="backup" structdir="struct" logfile="logs/test_${datetimes3}.log" tablist="ltab.txt" # Set the echo color gray='\033[30;1m' red='\033[31;1m' green='\033[32;1m' yellow='\033[33;1m' blue='\033[34;1m' pink='\033[35;1m' white='\033[37;1m' reset='\033[0m' [ ! -d $backupdir ] && mkdir -p $backupdir [ ! -d $structdir ] && mkdir $structdir [ ! -d logs ] && mkdir logs # logging function function logging { if [ ! -z "$1" ] && [ ! -z "$2" ];then echo -e "${green} ${1} --- ${2} ${reset}" echo -e "${datetimes} --- ${1} --- ${2}" >> $logfile fi } function error { if [ $? -eq 0 ];then logging "INFO" "$1" else logging "ERROR" "${reset}${red} $1 ,have an error occurred!" exit 1 fi } function yesorno { echo -e "${yellow} $1 ${reset}" read var case "$var" in [yY][eE][sS] ) echo "Your input is YES,Program to continue" ;; [nN][oO] ) echo "Your input is no."; exit 0;; **) echo -e "${red} Input Error! ${reset}" exit 0 ;; esac } echo -e "${yellow} This script is used to mysql table DATA DIRECTORY and INDEX DIRECTORY set to/data2/db/mysql and the migration of data to /data2/db/mysql directory. ${reset} " yesorno "Do you want to continue, yes or no?" logging "INFO" "You choose the name of the table below:" # Confirm the table to by update for tab in `cat $tablist`;do logging "INFO" "${tab}" done yesorno "The above is the table you choose, you want to continue? Yes or no?" # dump table data and struct to $backupdir and $structdir for tab in `cat $tablist`;do $mysqlpath/mysqldump -u$mysqluser -p$mysqlpass -h$mysqlhost -P$mysqlport --no-create-info $mysqldb $tab > ${backupdir}/${tab}.sql error "table insert statements $tab backuping" $mysqlpath/mysqldump -u$mysqluser -p$mysqlpass -h$mysqlhost -P$mysqlport --no-data $mysqldb $tab > ${structdir}/${tab}.sql error "table struct $tab backuping" done # append the DATA DIRECTOY and DATA DIRINDEX to table struct. for tab in `cat $tablist`;do if grep 'ENGINE=InnoDB' ${structdir}/${tab}.sql;then sed -i "s/ENGINE=InnoDB/& DATA DIRECTORY\=\'\/data2\/db\/mysql\' INDEX DIRECTORY\=\'\/data2\/db\/mysql\'/" ${structdir}/${tab}.sql error "append the ENGINE=InnoDB --> DATA DIRECTORY\=\'\/data2\/db\/mysql\'/ to ${structdir}/${tab}.sql" elif grep 'ENGINE=MyISAM' ${structdir}/${tab}.sql;then sed -i "s/ENGINE=MyISAM/& DATA DIRECTORY\=\'\/data2\/db\/mysql\' INDEX DIRECTORY\=\'\/data2\/db\/mysql\'/" ${structdir}/${tab}.sql error "append the ENGINE=InnoDB --> DATA DIRECTORY\=\'\/data2\/db\/mysql\'/ to ${structdir}/${tab}.sql" else logging "ERROR,Table structure is not found in the match engine ." exit 1 fi done # drop old database for tab in `cat $tablist`;do if [ -f ${backupdir}/${tab}.sql ] && [ -f ${structdir}/${tab}.sql ];then $mysqlpath/mysql -u$mysqluser -p$mysqlpass -h$mysqlhost -P$mysqlport $mysqldb -e "drop table ${tab};" error "There is no back up the table" fi # import table struct to db if [ -f ${structdir}/${tab}.sql ];then $mysqlpath/mysql -u$mysqluser -p$mysqlpass -h$mysqlhost -P$mysqlport $mysqldb < ${structdir}/${tab}.sql error "The import table structure" fi # import table data to db if [ -f ${backupdir}/${tab}.sql ];then $mysqlpath/mysql -u$mysqluser -p$mysqlpass -h$mysqlhost -P$mysqlport $mysqldb < ${backupdir}/${tab}.sql error "Insert data to the table" fi done logging "INFO" "Successfully completed the operation !"ltab.txt中存储你要想迁移的表名，如下所示：
[root@SERVER_DB] cat ltab.txt 2016_06_24_record_base_log 2016_06_16_record_base_log最后，记得在screen下执行脚本，即使终端断开，也不用担心，脚本终止执行。如果遇到错误，脚本会立即终止执行，此时需要手动来处理。
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