用clickhouse同步mysql数据

（Creative Commons）

业务场景，写个自动任务定时把mysql的数据同步clickhouse，利用clickhouse的高速查询来做大数据准备
实现原理，查询当前clickhouse的数据id,拉取mysql大于此id的数据，再插入到clickhouse

import pymysql
from clickhouse_driver import Client

click_client = Client("host", "port", "db", "usr", "passwd")
mysql_client =pymysql.connect(host='***',port=***,user='***',passwd='***',db='***',charset='utf8')

def get_id():
    click_sql = """SELECT id FROM test order by id desc limit 1"""
    try:
        list = click_client.execute(click_sql, types_check=True)
        for i in list:
            id = i[0]
            return id
    except Exception as e:
        print(e)

def get_data():
    log_id = get_id()
    cursor = mysql_client.cursor()
    sql= """SELECT * FROM test WHERE id > "%s" """ % log_id
    cursor.execute(sql)
    results = cursor.fetchall()
    mysql_client.close()
    return  results

def insert_data(data):
    try:
        click_client.execute('INSERT INTO test VALUES', [data], types_check=True)
        return "成功"
    except Exception as e:
        return(e)


def main():
    print (get_id())
    list = get_data()
    for data in list:
        print(data)
        print(insert_data(data))

if __name__ == '__main__':
    main()