连接mysql
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#!/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)
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增删分区
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#!/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()
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原文链接:https://blog.csdn.net/qq_42979842/article/details/115348455