python - SQL 语法错误

Question

我正在尝试通过 python 脚本运行 MySQL 查询，但在我的 SQL 语法中不断出现错误，从我可以看到查询设置正确。有人可以给我第二眼吗？

    conn = mysql.connector.connect(**config)
    connect = conn.cursor()
    query = u'INSERT INTO page_load_times (self, object_id, page_header, elapsed_time, date_run) ' \
            'VALUES ({}, {}, {}, {}, {})'.format(self, self.object_id, self.page_header, t.interval, timestamp)
    connect.execute(query)
    conn.commit()
    conn.close()

我得到的错误如下:

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 '13:56:17.491000)' at line 1

Answer 1

不要通过字符串格式传递查询参数。

让 mysql 客户端通过将参数传递到 execute() 的第二个参数中的查询来完成这项工作。除了没有引号和数据类型转换的问题外，您还可以避免 sql 注入(inject)风险:

query = """INSERT INTO 
               page_load_times 
               (self, object_id, page_header, elapsed_time, date_run)
           VALUES 
               (%(self)s, %(object_id)s, %(page_header)s, %(interval)s, %(timestamp)s)"""
params = {'self': self, 
          'object_id': self.object_id, 
          'page_header': self.page_header, 
          'interval': t.interval, 
          'timestamp': timestamp}

connect.execute(query, params)