每天迁移MySQL历史数据到历史库Python脚本


Posted in Python onApril 13, 2018

本文实例为大家分享了Python每天迁移MySQL历史数据到历史库的具体代码,供大家参考,具体内容如下

#!/usr/bin/env python 
# coding:utf-8 
__author__ = 'John' 
 

import MySQLdb 
import sys 
import datetime 
import time 
 
class ClassMigrate(object): 
  def _get_argv(self): 
    self.usage = """ 
      usage(): 
      python daily_migration.py --source=192.168.1.4:3306/db_name:tab_name/proxy/password \\ 
                    --dest=192.168.1.150:13301/db_name_archive:tab_name_201601/proxy/password \\ 
                    --delete_strategy=delete --primary_key=auto_id --date_col=ut --time_interval=180 
      """ 
    if len(sys.argv) == 1: 
      print self.usage 
      sys.exit(1) 
    elif sys.argv[1] == '--help' or sys.argv[1] == '-h': 
        print self.usage 
        sys.exit() 
    elif len(sys.argv) > 2: 
      for i in sys.argv[1:]: 
        _argv = i.split('=') 
        if _argv[0] == '--source': 
          _list = _argv[1].split('/') 
          self.source_host = _list[0].split(':')[0] 
          self.source_port = int(_list[0].split(':')[1]) 
          self.source_db = _list[1].split(':')[0] 
          self.source_tab = _list[1].split(':')[1] 
          self.source_user = _list[2] 
          self.source_password = _list[3] 
        elif _argv[0] == '--dest': 
          _list = _argv[1].split('/') 
          self.dest_host = _list[0].split(':')[0] 
          self.dest_port = int(_list[0].split(':')[1]) 
          self.dest_db = _list[1].split(':')[0] 
          self.dest_tab = _list[1].split(':')[1] 
          self.dest_user = _list[2] 
          self.dest_password = _list[3] 
        elif _argv[0] == '--delete_strategy': 
          self.deleteStrategy = _argv[1] 
          if self.deleteStrategy not in ('delete', 'drop'): 
            print (self.usage) 
            sys.exit(1) 
        elif _argv[0] == '--primary_key': 
          self.pk = _argv[1] 
        elif _argv[0] == '--date_col': 
          self.date_col = _argv[1] 
        elif _argv[0] == '--time_interval': 
          self.interval = _argv[1] 
        else: 
          print (self.usage) 
          sys.exit(1) 
 
  def __init__(self): 
    self._get_argv() 
## -------------------------------------------------------------------- 
    self.sourcedb_conn_str = MySQLdb.connect(host=self.source_host, port=self.source_port, user=self.source_user, passwd=self.source_password, db=self.source_db, charset='utf8') 
    self.sourcedb_conn_str.autocommit(True) 
    self.destdb_conn_str = MySQLdb.connect(host=self.dest_host, port=self.dest_port, user=self.dest_user, passwd=self.dest_password, db=self.dest_db, charset='utf8') 
    self.destdb_conn_str.autocommit(True) 
## -------------------------------------------------------------------- 
    self.template_tab = self.source_tab + '_template' 
    self.step_size = 20000 
## -------------------------------------------------------------------- 
    self._migCompleteState = False 
    self._deleteCompleteState = False 
## -------------------------------------------------------------------- 
    self.source_cnt = '' 
    self.source_min_id = '' 
    self.source_max_id = '' 
    self.source_checksum = '' 
    self.dest_cn = '' 
## -------------------------------------------------------------------- 
    self.today = time.strftime("%Y-%m-%d") 
    # self.today = '2016-05-30 09:59:40' 

def sourcedb_query(self, sql, sql_type): 
    try: 
      cr = self.sourcedb_conn_str.cursor() 
      cr.execute(sql) 
      if sql_type == 'select': 
        return cr.fetchall() 
      elif sql_type == 'dml': 
        rows = self.sourcedb_conn_str.affected_rows() 
        return rows 
      else: 
        return True 
    except Exception, e: 
      print (str(e) + "<br>") 
      return False 
    finally: 
      cr.close() 

  def destdb_query(self, sql, sql_type, values=''): 
    try: 
      cr = self.destdb_conn_str.cursor() 
      if sql_type == 'select': 
        cr.execute(sql) 
        return cr.fetchall() 
      elif sql_type == 'insertmany': 
        cr.executemany(sql, values) 
        rows = self.destdb_conn_str.affected_rows() 
        return rows 
      else: 
        cr.execute(sql) 
        return True 
    except Exception, e: 
      print (str(e) + "<br>") 
      return False 
    finally: 
      cr.close() 
 
 def create_table_from_source(self): 
    '''''因为tab_name表的数据需要迁移到archive引擎表,所以不适合使用这种方式。 预留作其他用途。''' 
    try: 
      sql = "show create table %s;" % self.source_tab 
      create_str = self.sourcedb_query(sql, 'select')[0][1] 
      create_str = create_str.replace('CREATE TABLE', 'CREATE TABLE IF NOT EXISTS') 
      self.destdb_query(create_str, 'ddl') 
      return True 
    except Exception, e: 
      print (str(e) + "<br>") 
      return False 

  def create_table_from_template(self): 
    try: 
      sql = 'CREATE TABLE IF NOT EXISTS %s like %s;' % (self.dest_tab, self.template_tab) 
      state = self.destdb_query(sql, 'ddl') 
      if state: 
        return True 
      else: 
        return False 
    except Exception, e: 
      print (str(e + "<br>") + "<br>") 
      return False 

  def get_min_max(self): 
    """ 创建目标表、并获取源表需要迁移的总条数、最小id、最大id """ 
    try: 
      print ("\nStarting Migrate at -- %s <br>") % (datetime.datetime.now().__str__()) 
      sql = """select count(*),IFNULL(min(%s),-1),IFNULL(max(%s),-1) from %s where %s >= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 00:00:00') \ 
           and %s <= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 23:59:59') """ \ 
            % (self.pk, self.pk, self.source_tab, self.date_col, self.today, self.interval, self.date_col, self.today, self.interval) 
      q = self.sourcedb_query(sql, 'select') 
      self.source_cnt = q[0][0] 
      self.source_min_id = q[0][1] 
      self.source_max_id = q[0][2] 
      self.source_checksum = str(self.source_cnt) + '_' + str(self.source_min_id) + '_' + str(self.source_max_id) 
      if self.source_cnt == 0 or self.source_min_id == -1 or self.source_max_id == -1: 
        print ("There is 0 record in source table been matched! <br>") 
        return False 
      else: 
        return True 
    except Exception, e: 
      print (str(e) + "<br>") 
      return False 
 
  def migrate_2_destdb(self): 
    try: 
      get_min_max_id = self.get_min_max() 
      if get_min_max_id: 
        k = self.source_min_id 
        desc_sql = "desc %s;" % self.source_tab 
        # self.filed = [] 
        cols = self.sourcedb_query(desc_sql, 'select') 
        # for j in cols: 
        #   self.filed.append(j[0]) 
        fileds = "%s," * len(cols) # 源表有多少个字段,就拼凑多少个%s,拼接到insert语句 
        fileds = fileds.rstrip(',') 
        while k <= self.source_max_id: 
          sql = """select * from %s where %s >= %d and %s< %d \ 
               and %s >= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 00:00:00') \ 
               and %s <= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 23:59:59') """\ 
             % (self.source_tab, self.pk, k, self.pk, k+self.step_size, self.date_col, self.today, self.interval, self.date_col, self.today, self.interval) 
          print ("\n%s <br>") % sql 
          starttime = datetime.datetime.now() 
          results = self.sourcedb_query(sql, 'select') 
          insert_sql = "insert into " + self.dest_tab + " values (%s)" % fileds 
          rows = self.destdb_query(insert_sql, 'insertmany', results) 
          if rows == False: 
            print ("Insert failed!! <br>") 
          else: 
            print ("Inserted %s rows. <br>") % rows 
          endtime = datetime.datetime.now() 
          timeinterval = endtime - starttime 
          print("Elapsed :" + str(timeinterval.seconds) + '.' + str(timeinterval.microseconds) + " seconds <br>") 
          k += self.step_size 
        print ("\nInsert complete at -- %s <br>") % (datetime.datetime.now().__str__()) 
        return True 
      else: 
        return False 
    except Exception, e: 
      print (str(e) + "<br>") 
      return False 
  
  def verify_total_cnt(self): 
    try: 
      sql = """select count(*),IFNULL(min(%s),-1),IFNULL(max(%s),-1) from %s where %s >= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 00:00:00') \ 
           and %s <= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 23:59:59') """ \ 
            % (self.pk, self.pk, self.dest_tab, self.date_col, self.today, self.interval, self.date_col, self.today, self.interval) 
      dest_result = self.destdb_query(sql, 'select') 
      self.dest_cnt = dest_result[0][0] 
      dest_checksum = str(self.dest_cnt) + '_' + str(dest_result[0][1]) + '_' + str(dest_result[0][2]) 
      print ("source_checksum: %s, dest_checksum: %s <br>") % (self.source_checksum, dest_checksum) 
      if self.source_cnt == dest_result[0][0] and dest_result[0][0] != 0 and self.source_checksum == dest_checksum: 
        self._migCompleteState = True 
        print ("Verify successfully !!<br>") 
      else: 
        print ("Verify failed !!<br>") 
        sys.exit(77) 
    except Exception, e: 
      print (str(e) + "<br>") 
  
  def drop_daily_partition(self): 
    try: 
      if self._migCompleteState: 
        sql = """explain partitions select * from %s where %s >= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 00:00:00') 
               and %s <= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 23:59:59') """\ 
             % (self.source_tab, self.date_col, self.today, self.interval, self.date_col, self.today, self.interval) 
        partition_name = self.sourcedb_query(sql, 'select') 
        partition_name = partition_name[0][3] 
 
 
 
 
        sql = """select count(*),IFNULL(min(%s),-1),IFNULL(max(%s),-1) from %s partition (%s)""" \ 
            % (self.pk, self.pk, self.source_tab, partition_name) 
        q = self.sourcedb_query(sql, 'select') 
        source_cnt = q[0][0] 
        source_min_id = q[0][1] 
        source_max_id = q[0][2] 
        checksum = str(source_cnt) + '_' + str(source_min_id) + '_' + str(source_max_id) 
        if source_cnt == 0 or source_min_id == -1 or source_max_id == -1: 
          print ("There is 0 record in source PARTITION been matched! <br>") 
        else: 
          if checksum == self.source_checksum: 
            drop_par_sql = "alter table %s drop partition %s;" % (self.source_tab, partition_name) 
            droped = self.sourcedb_query(drop_par_sql, 'ddl') 
            if droped: 
              print (drop_par_sql + " <br>") 
              print ("\nDrop partition complete at -- %s <br>") % (datetime.datetime.now().__str__()) 
              self._deleteCompleteState = True 
            else: 
              print (drop_par_sql + " <br>") 
              print ("Drop partition failed.. <br>") 
          else: 
            print ("The partition %s checksum failed !! Drop failed !!") % partition_name 
            sys.exit(77) 
    except Exception, e: 
      print (str(e) + "<br>") 
 
  def delete_data(self): 
    try: 
      if self._migCompleteState: 
        k = self.source_min_id 
        while k <= self.source_max_id: 
          sql = """delete from %s where %s >= %d and %s< %d \ 
               and %s >= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 00:00:00') \ 
               and %s <= CONCAT(DATE_FORMAT(DATE_ADD('%s', INTERVAL -%s day),'%%Y-%%m-%%d'), ' 23:59:59') """ \ 
             % (self.source_tab, self.pk, k, self.pk, k+self.step_size, self.date_col, self.today, self.interval, self.date_col, self.today, self.interval) 
          print ("\n%s <br>") % sql 
          starttime = datetime.datetime.now() 
          rows = self.sourcedb_query(sql, 'dml') 
          if rows == False: 
            print ("Delete failed!! <br>") 
          else: 
            print ("Deleted %s rows. <br>") % rows 
          endtime = datetime.datetime.now() 
          timeinterval = endtime - starttime 
          print("Elapsed :" + str(timeinterval.seconds) + '.' + str(timeinterval.microseconds) + " seconds <br>") 
          time.sleep(1) 
          k += self.step_size 
        print ("\nDelete complete at -- %s <br>") % (datetime.datetime.now().__str__()) 
        self._deleteCompleteState = True 
    except Exception, e: 
      print (str(e) + "<br>") 
       
  def do(self): 
    tab_create = self.create_table_from_template() 
    if tab_create: 
      migration = self.migrate_2_destdb() 
      if migration: 
        self.verify_total_cnt() 
        if self._migCompleteState: 
          if self.deleteStrategy == 'drop': 
            self.drop_daily_partition() 
          else: 
            self.delete_data() 
          print ("\n<br>") 
          print ("====="*5 + '<br>') 
          print ("source_total_cnt: %s <br>") % self.source_cnt 
          print ("dest_total_cnt: %s <br>") % self.dest_cnt 
          print ("====="*5 + '<br>') 
          if self._deleteCompleteState: 
            print ("\nFinal result: Successfully !! <br>") 
            sys.exit(88) 
          else: 
            print ("\nFinal result: Failed !! <br>") 
            sys.exit(254) 
    else: 
      print ("Create table failed ! Exiting. . .") 
      sys.exit(255) 
  
f = ClassMigrate() 
f.do()

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持三水点靠木。

Python 相关文章推荐
对于Python中线程问题的简单讲解
Apr 03 Python
使用Python对Excel进行读写操作
Mar 30 Python
Python正则表达式经典入门教程
May 22 Python
python 获取页面表格数据存放到csv中的方法
Dec 26 Python
python增加图像对比度的方法
Jul 12 Python
python elasticsearch环境搭建详解
Sep 02 Python
python对验证码降噪的实现示例代码
Nov 12 Python
python 画条形图(柱状图)实例
Apr 24 Python
python redis存入字典序列化存储教程
Jul 16 Python
Python Sqlalchemy如何实现select for update
Oct 12 Python
python自动化操作之动态验证码、滑动验证码的降噪和识别
Aug 30 Python
PYTHON 使用 Pandas 删除某列指定值所在的行
Apr 28 Python
python实现数据库跨服务器迁移
Apr 12 #Python
解决python3爬虫无法显示中文的问题
Apr 12 #Python
python读取中文txt文本的方法
Apr 12 #Python
基于python 处理中文路径的终极解决方法
Apr 12 #Python
解决Python2.7读写文件中的中文乱码问题
Apr 12 #Python
python 实现对文件夹内的文件排序编号
Apr 12 #Python
pandas数值计算与排序方法
Apr 12 #Python
You might like
isset和empty的区别
2007/01/15 PHP
php代码收集表单内容并写入文件的代码
2012/01/29 PHP
PHP多线程批量采集下载美女图片的实现代码(续)
2013/06/03 PHP
PHP修改session_id示例代码
2014/01/08 PHP
推荐一本PHP程序猿都应该拜读的书
2014/12/31 PHP
JavaScript游戏之优化篇
2010/11/08 Javascript
jquery ajax jsonp跨域调用实例代码
2013/12/11 Javascript
jquery 绑定回车动作扑捉回车键触发的事件
2014/03/26 Javascript
Jquery实现的角色左右选择特效
2014/05/21 Javascript
基于Bootstrap+jQuery.validate实现Form表单验证
2014/12/16 Javascript
js实现可兼容IE、FF、Chrome、Opera及Safari的音乐播放器
2015/02/11 Javascript
使用AngularJS和PHP的Laravel实现单页评论的方法
2015/06/19 Javascript
详解JavaScript中的Unescape()和String() 函数
2015/11/09 Javascript
bootstrap输入框组使用方法
2017/02/07 Javascript
AngularJS页面传参的5种方式
2017/04/01 Javascript
vue-dplayer 视频播放器实例代码
2019/11/08 Javascript
vue中js判断长时间不操作界面自动退出登录(推荐)
2020/01/22 Javascript
微信小程序点击按钮动态切换input的disabled禁用/启用状态功能
2020/03/07 Javascript
详解如何在vue+element-ui的项目中封装dialog组件
2020/12/11 Vue.js
Python内建数据结构详解
2016/02/03 Python
Python3.4实现远程控制电脑开关机
2018/02/22 Python
解决Python的str强转int时遇到的问题
2018/04/09 Python
python清除函数占用的内存方法
2018/06/25 Python
Django 静态文件配置过程详解
2019/07/23 Python
numpy.random.shuffle打乱顺序函数的实现
2019/09/10 Python
python实现扑克牌交互式界面发牌程序
2020/04/22 Python
大都会艺术博物馆商店:The Met Store
2018/06/22 全球购物
最新的小工具和卓越的产品设计:Oh That Tech!
2019/08/07 全球购物
什么是.net
2015/08/03 面试题
英文版银行求职信
2013/10/09 职场文书
新闻学专业个人求职信写作
2014/02/04 职场文书
优秀实习生主要事迹
2014/05/29 职场文书
学生实习证明范文
2014/09/28 职场文书
2015年优质护理服务工作总结
2015/04/08 职场文书
Python如何把不同类型数据的json序列化
2021/04/30 Python
python操作xlsx格式文件并读取
2021/06/02 Python