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连接mysql
#!/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
#!/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()
