Python实现Mysql全量数据同步的脚本分享

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import time
import datetime
import pymysql
import os

CUR_PATH = os.path.dirname(os.path.abspath(__file__))

# 需要同步的表
table_names = ['table_name_1', 'table_name_2']

source_db_config = {
    'db_host': 'XXXXX',
    'db_user': 'XXXX',
    'db_pwd': 'XXXX',
    'db': 'XCXXXCX',
    'db_port': 3306,
}

out_db_config = {
    'db_host': 'XXXX',
    'db_user': 'XXXX',
    'db_pwd': 'XXXX',
    'db': 'XXXXX',
    'db_port': 3306,
}


def get_datas(table_name):
    """源数据库，获取全量数据"""
    db = pymysql.connect(source_db_config['db_host'], source_db_config['db_user'], source_db_config['db_pwd'],
                         source_db_config['db'], source_db_config['dp_port'], charset='utf8')
    cursor = db.cursor(pymysql.cursors.DictCursor)
    readsql = '''select * from {}'''.format(table_name)
    cursor.execute(readsql)
    results = cursor.fetchall()
    for data in results:
        yield data
    cursor.close()
    db.close()


def format_data(data):
    """数据格式化"""
    for k, v in data.items():
        if type(v) == datetime.datetime:
            data[k] = "'{}'".format(v.strftime('%Y-%m-%d %H:%M:%S'))
        elif type(v) == type(v) == datetime.date:
            data[k] = "'{}'".format(v.strftime('%Y-%m-%d'))
        elif type(v) == unicode:
            data[k] = "'{}'".format(v.encode('utf-8'))
    return data


def out_put_data(table_name):
    write = pymysql.connect(out_db_config['db_host'], out_db_config['db_user'], out_db_config['db_pwd'],
                            out_db_config['db'], out_db_config['dp_port'], charset='utf8')
    for data in get_datas(table_name):
        write_cursor = write.cursor()
        data = format_data(data)
        sql = ','.join(['{}=%s'.format(item) for item in data.keys()])
        temp = sql % (tuple(data.values()))

        write_sql = '''insert  into  %s set %s on  duplicate key update %s''' % (table_name, temp, temp)
        try:
            write_cursor.execute(write_sql)
            write.commit()
        except Exception as e:
            print("insert error, err_msg is {}".format(e))
            write.rollback()
        finally:
            write_cursor.close()
    write.close()


if __name__ == "__main__":
    start_time = time.time()
    for table_name in table_names:
        out_put_data(table_name=table_name)
    end_time = time.time()
    cost_time = end_time - start_time
    print("cost_time is {}".format(cost_time))