Python MySQL 多函数显示 InternalError: Unread result found

Question

我创建函数 function1_db() 用于从列 j_id 获取最新的 id，而 function2_read() 用于插入新数据。每个函数都必须像这样连接到 MySQL 数据库。

mydb = mysql.connector.connect(
  host="xxxxxxxxxxx",
  user="xxx",
  passwd="xxxxxx",
  database="test_db"
)


def function1_db():

    last_id = 0 

    mycursor = mydb.cursor()

    sql = "SELECT * FROM log ORDER BY j_id DESC"

    mycursor.execute(sql)
    result = mycursor.fetchone()

    mycursor.close()

    if result != None:

        last_id = result[4]

    return last_id

def function2_read(last_id):

    mycursor = mydb.cursor()

    res = "xxx"
    if not res.empty:

        sql = "INSERT INTO log (id, user, number, time, j_id, alert) VALUES (%s, %s, %s, %s)"
        val = [(None, res['User'], res['Pages'] , res['State'], last_id, 0 )]

        mycursor.executemany(sql, val)

        mydb.commit()

        print(mycursor.rowcount, "was inserted.") 

        mycursor.close()

当我运行此代码时，它会显示这样的错误。如何解决？

    raise errors.InternalError("Unread result found")

InternalError: Unread result found

Answer 1

尝试设置 Buffered = true (from related question)

mycursor = mydb.cursor(buffered=True)