LOAD DATA LOCAL INFILE上的Python2.7 MySQL连接器错误

时间:2013-10-02 17:54:51

标签: python mysql python-2.7 mysql-connector

我正在尝试使用Python和MySQL Connector将人口普查数据动态加载到mysql数据库(来自.csv文件)。

我无法弄清楚为什么我会收到错误:

Traceback (most recent call last):
  File "miner.py", line 125, in <module>
    cursor.execute(add_csv_file, csv_info)
  File "/Library/Python/2.7/site-packages/mysql/connector/cursor.py", line 393, in execute
    self._handle_result(self._connection.cmd_query(stmt))
  File "/Library/Python/2.7/site-packages/mysql/connector/connection.py", line 586, in cmd_query
statement))
  File "/Library/Python/2.7/site-packages/mysql/connector/connection.py", line 508, in _handle_result
    raise errors.get_exception(packet)
mysql.connector.errors.ProgrammingError: 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '/Users/afink/Documents/Research/Current Papers & Books/Youth Assessm' at line 1

执行前输出的字符串在同一用户下的MySQL命令行界面中正常工作。

似乎它应该是一个简单的问题,但我被卡住了!

def db_connect():
    config = {
        'user': 'username',
        'password': 'pass',
        'host': 'localhost',
        'database': 'uscensus',
        'raise_on_warnings': True,
    }

    from mysql.connector import errorcode
    try:
      cnx = mysql.connector.connect(**config)
      return cnx
    except mysql.connector.Error as err:
      if err.errno == errorcode.ER_ACCESS_DENIED_ERROR:
        print("Something is wrong with your user name or password")
      elif err.errno == errorcode.ER_BAD_DB_ERROR:
        print("Database does not exist")
      else:
        print(err)
    else:
      cnx.close()


cursor = cnx.cursor()

os.chdir("./")
for files in glob.glob("*.csv"):

    add_csv_file = ('''load data local infile '%(cwd)s/%(file_name)s' into table %(table_name)s 
                    columns terminated by ',' 
                    optionally enclosed by '\"'
                    escaped by '\"'
                    lines terminated by '\\n';''')

    # Insert CSV file information
    csv_info = {
        'cwd': os.getcwd(),
        'file_name': files,
        'table_name': 'SF1_' + files[2:-8],
    }


    print add_csv_file % csv_info # Temporary Debug

    cursor.execute(add_csv_file, csv_info)

# Make sure data is committed to the database
cnx.commit()
cursor.close()
cnx.close()

提前感谢您的帮助!

4 个答案:

答案 0 :(得分:3)

通过在连接中添加适当的客户端标志,可以轻松解决此问题,如下所示:

import mysql.connector
from mysql.connector.constants import ClientFlag

cnx = mysql.connector.connect(user='[username]', password='[pass]', host='[host]', client_flags=[ClientFlag.LOCAL_FILES])
cursor = cnx.cursor()

这将允许MySQL访问您计算机上的本地文件,然后以下LOAD将起作用:

LoadSQL = """LOAD DATA LOCAL INFILE '%s'
    INTO TABLE %s
    FIELDS TERMINATED BY '\t'
    LINES TERMINATED BY '\n'
    IGNORE 1 LINES
    (field1, field2, field3, field4)""" % (csvfile, tabl_name)
cursor.execute(LoadSQL)
cnx.commit()
cursor.close()
cnx.close()

答案 1 :(得分:1)

好的,这就是我的想法。

@Dd_tch - 你的回答让我意识到这段代码会更好用:

query = add_csv_file % csv_info
cursor.execute(query)

虽然连接器的MySQL站点似乎表明你可以做我正在做的事情(http://dev.mysql.com/doc/connector-python/en/connector-python-example-cursor-transaction.html),但这不起作用。

当我解决这个问题时,我遇到了一个新错误:     mysql.connector.errors.ProgrammingError:1148(42000):此MySQL版本不允许使用该命令

有几个站点表明可以通过在MySQL Connector配置中添加“local_infile = 1”来解决这个问题。这是一个:http://dev.mysql.com/doc/refman/5.1/en/loading-tables.html

此解决方案对我不起作用。我的local_infile在MySQL上设置为1,我无法在Python代码中设置它,或者我得到了一个e

我将改为将LOAD LOCAL DATA INFILE替换为逐行读取CSV文件并将行插入数据库的内容。这将使代码更容易移植到其他数据库。

答案 2 :(得分:1)

在执行mysql.connector.connect时添加字段allow_local_infile = "True"。 会

答案 3 :(得分:0)

调用execute()方法时出错:

  

cursor.execute(add_csv_file,csv_info)

尝试:

  

cursor.execute(query,(add_csv_file,csv_info,))