#!/bin/bash

#按年分区，每年的12月份执行该脚本

table=tablexxx

mysql=/usr/local/mysql/bin/mysql

user=xxx

password=xxxx

#MySQL添加分区的时候，不需要指定字段名称

str_0="alter TABLE $table add partition ("

str_1="PARTITION p"

str_2="VALUES LESS THAN (unix_timestamp('"

str_4=") ENGINE = InnoDB);"

str_3="')"

str_all=''

now_month=`date +%m`

i=1

#按年分区

while [ $i -lt 13 ] #一次添加12个分区

do

month=`date -d "-${i} month ago " +%Y%m` #年月，格式如201607

let j=i+1

day=`date -d "-${j} month ago " +%Y-%m`"-01" #年月日，格式如2016-08-01

str_line="${str_0}$str_1${month} $str_2${day}${str_3}$str_4\n"

#格式如：alter TABLE tablexxx add partition (PARTITION p201607 VALUES LESS THAN (unix_timestamp('2016-08-01')) ENGINE = InnoDB);

#  echo $str_line

str_all=$str_all${str_line}

let i=i+1

done

#echo -e  $str_all

mysql -u$user -p$password -e "use tmp;CREATE TABLE if not exists  tablexxx  (  id  int(11) NOT NULL AUTO_INCREMENT, ips  varchar(50) DEFAULT NULL COMMENT '访客IP', from_linkid  int(11) DEFAULT NULL COMMENT '链接的ID号', adddate  int(11) DEFAULT NULL COMMENT '访问时间', HTTP_REFERER  varchar(300) DEFAULT NULL COMMENT '来源', location_url  varchar(255) NOT NULL DEFAULT '' COMMENT '当前url',PRIMARY KEY ( id , adddate ),KEY  from_linkid  ( from_linkid ),KEY  idx_referer  ( HTTP_REFERER (255)),KEY  idx_adddate  ( adddate )) ENGINE=InnoDB DEFAULT CHARSET=utf8 COMMENT='网站联盟-来访IP记录'PARTITION BY RANGE (adddate)( PARTITION p201506 VALUES LESS THAN (unix_timestamp('2015-07-01')), PARTITION p201507 VALUES LESS THAN (unix_timestamp('2015-08-01')),  PARTITION p201508 VALUES LESS THAN (unix_timestamp('2015-09-01')));"

mysql -u$user -p$password -e "use tmp;$str_all"