Python mysql 连接器加载语句在错误的目录 Windows 中搜索

Question

使用代码:

import mysql.connector
cnx = mysql.connector.connect(user='usr', password='pswd',
                              host='127.0.0.1',
                              database='db')

cursor = cnx.cursor()

cursor.execute(
    "LOAD DATA INFILE 'C:\\Users\\user\\Documents\\csvFiles\\Lamborghini-data.csv' "
    "INTO TABLE lamborghini "
    "FIELDS TERMINATED BY ',' "
    "ENCLOSED BY '\"' "
    "LINES TERMINATED BY '\\n' "
    "IGNORE 1 ROWS "
    "(model_year, make, model, model_info, price, status, auction_location, auction_year);"
)

我成功连接到数据库，但出于某种原因，加载语句查找“C:\xampp\mysql\data...”中的文件，而不是指定的路径。

这是错误:

Traceback (most recent call last):
  File "createAndLoadDB.py", line 42, in <module>
    "LOAD DATA INFILE 'C:\\Users\\david\\Documents\\MecumProject2\\MecumScraper\\csvFiles\\Lamborghini-data.csv' "
  File "C:\Users\david\Anaconda3\envs\MecumDBEnv\lib\site-packages\mysql\connector\cursor.py", line 566, in execute
    self._handle_result(self._connection.cmd_query(stmt))
  File "C:\Users\david\Anaconda3\envs\MecumDBEnv\lib\site-packages\mysql\connector\connection.py", line 549, in cmd_query
    result = self._handle_result(self._send_cmd(ServerCmd.QUERY, query))
  File "C:\Users\david\Anaconda3\envs\MecumDBEnv\lib\site-packages\mysql\connector\connection.py", line 438, in _handle_result
    raise errors.get_exception(packet)
mysql.connector.errors.DatabaseError: 29 (HY000): File 'C:\xampp\mysql\data\UsersdavidDocumentsMecumProject2MecumScrapercsvFilesLamborghini-data.csv' not found (Errcode: 2 "No such file or directory")

它似乎是从我指定的文件中删除'\\'，并在'C\xampp\mysql\data...'中搜索它。

如果语句在 .sql 文件中，我可以成功执行该语句，但是在我的 python 脚本中使用它时 mysql.connector 会抛出上述错误。

Answer 1

Why your file path would start with C:\xampp\mysql\data\?

此问题与您的 secure_file_priv 有关。比如我的my.ini是

[mysqld]
secure_file_priv = "D:\MySQL\datas"

所以我只能加载D:\MySQL\datas下的csv。但您可以设置 secure_file_priv = "" 来禁用此选项。

How to stop removing the '\' from the file I specify?

在你的字符串前添加r，你需要继续使用\\。为什么会这样，可能是多次传递，字符串从Python传递到mysql。

r"""LOAD DATA INFILE 'C:\\abc\\def.csv'
INTO TABLE test 
FIELDS TERMINATED BY ',' 
ENCLOSED BY '\"'
LINES TERMINATED BY '\n'
IGNORE 1 ROWS
(col);"""