脚本之家,脚本语言编程技术及教程分享平台!
分类导航

Python|VBS|Ruby|Lua|perl|VBA|Golang|PowerShell|Erlang|autoit|Dos|bat|

服务器之家 - 脚本之家 - Python - python 实现mysql自动增删分区的方法

python 实现mysql自动增删分区的方法

2021-09-30 00:23_雪辉_ Python

这篇文章主要介绍了python 实现mysql自动增删分区的方法,文中通过示例代码介绍的非常详细,对大家的学习或者工作具有一定的参考学习价值,需要的朋友们下面随着小编来一起学习学习吧

连接mysql

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
#!/usr/bin/python
#-*- coding:utf-8 -*-
 
import time
import pymysql
 
class connect_mysql(object):
  def __init__(self, host, dbname):
    self.mysql_config = {
      'host': host,
      'port': 33071,
      'user': 'sysbench',
      'passwd': '970125',
      'db': dbname,
      'charset': 'utf8mb4',
    }
    self.dbname = dbname
 
 
  def select_db(self, sql):
    mysql_conn = pymysql.connect(**self.mysql_config)
    try:
      query = "%s" %(sql)
      cur = mysql_conn.cursor()
      cur.execute(query)
      results = cur.fetchall()
      cur.close()
      mysql_conn.close()
      return results
    except exception as err:
      print(err)
 
  def excute_db(self, sql):
    mysql_conn = pymysql.connect(**self.mysql_config)
    try:
      cur = mysql_conn.cursor()
      cur.execute(sql)
      mysql_conn.commit()
      cur.close()
      mysql_conn.close()
      return 0
    except exception as err:
      mysql_conn.rollback()
      print(err)

增删分区

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
#!/usr/bin/python
#-*- coding:utf-8 -*-
import sys
import pymysql
import importlib
import logging
from datetime import datetime, timedelta
from dateutil.relativedelta import relativedelta
from connect_db_forbatch import connect_mysql
 
def incr_partition():
  print("新增分区...")
  max_partition_sql = "select replace(partition_name,'p','') from information_schema.partitions where table_schema='%s' and table_name='%s' order by partition_ordinal_position desc limit 1;" %(db_name,table_name)
#  print(max_partition_sql)
  max_partition = connect_mysql(host,db_name).select_db(max_partition_sql)
  max_date = str(max_partition[0][0])
  max_partition_name = (datetime.strptime(max_date, "%y%m%d") + relativedelta(days=1)).strftime("%y%m%d")
  max_partition_value = (datetime.strptime(max_date, "%y%m%d") + relativedelta(days=2)).strftime("'%y-%m-%d'")
  alter_max_partition_sql = "alter table %s.%s add partition (partition p%s values less than (to_days(%s)) engine = innodb);" %(db_name,table_name,max_partition_name,max_partition_value)
  print(alter_max_partition_sql)
  connect_mysql(host,db_name).excute_db(alter_max_partition_sql)
 
def del_partition():
  print("删除分区...")
  min_partition_sql = "select replace(partition_name,'p','') from information_schema.partitions where table_schema='sbtest' and table_name='t1' order by partition_ordinal_position limit 1;"
#  print(min_partition_sql)
  min_partition = connect_mysql(host,db_name).select_db(min_partition_sql)
  min_date = str(min_partition[0][0])
  min_partition_name = (datetime.strptime(min_date, "%y%m%d") + relativedelta(days=0)).strftime("%y%m%d")
  alter_min_partition_sql = "alter table %s.%s drop partition p%s;" %(db_name,table_name,min_partition_name)
  print(alter_min_partition_sql)
  connect_mysql(host,db_name).excute_db(alter_min_partition_sql)
 
if __name__ == "__main__":
  host = sys.argv[1]
  db_name = sys.argv[2]
  table_name = sys.argv[3]
  incr_partition()
  del_partition()

到此这篇关于python 实现mysql自动增删分区的方法的文章就介绍到这了,更多相关python mysql自动增删分区内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家!

原文链接:https://blog.csdn.net/qq_42979842/article/details/115348455

延伸 · 阅读

精彩推荐