Python MySQLdb處理多個遊標：命令不同步

我有一個數據庫連接方法，它創建連接並將光標設置爲init進程的一部分。Python MySQLdb處理多個遊標：命令不同步

然後我有以下使用遊標方法：

def calculatePercentile(self): 
    user_edits = ur'''SELECT /* SLOW_OK_LIMIT: 1800 */ user_id, user_editcount from user''' 
    num_user_per_percentile = ur'''SELECT /* SLOW_OK_LIMIT: 1800 */ count(user_id) from user where user_editcount = %(count)s'''   
    lang_edit_count_dictionary = {} 
    lang_edit_count_dictionary[self.language] = [] 
    edit_count_list = [] 
    p = [10, 20, 30, 40, 50, 60, 70, 80, 90, 95] 
    bot_users = self._getBotUsers() 
    success = False 
    attempts = 0 
    while attempts < 3 and not success: 
     try: 
      self.dbCursor.execute(user_edits) 
      for user in self.dbCursor.fetchall(): 
       user_id = user['user_id'] 
       user_editcount = user['user_editcount'] 
       if user_id not in bot_users: 
        edit_count_list.append(user_editcount) 
      edit_count_list.sort() 
      for i in p: 
       lang_edit_count_dictionary[self.language].append(np.percentile(edit_count_list, i)) 
      success = True 
     except MySQLdb.OperationalError, sqlEx: 
      attempts += 1 
      if sqlEx[0] == 2006: 
       logging.info("Caught the MySQL server gone away exception") 
       logging.error(sqlEx) 
       time.sleep(10) 
       self.connectServer() 
     except Exception, e: 
      traceback.print_exc() 
      logging.exception(e) 
    for key, values in lang_edit_count_dictionary.iteritems(): 
     print key 
     for value in values: 
      self.dbCursor.execute(num_user_per_percentile, {"count":value}) 
      uEditCount = self.dbCursor.fetchone() 
      print uEditCount

一下這個方法所做的是，它執行一個查詢獲取數據和轉儲到該數據，然後使用相同的光標來執行另一個查詢內部：

for key, values in lang_edit_count_dictionary.iteritems(): 
    print key 
    for value in values: 
     self.dbCursor.execute(num_user_per_percentile, {"count":value}) 
     uEditCount = self.dbCursor.fetchone() 
     print uEditCount

什麼情況是，我得到以下錯誤：

self.dbCursor.execute(num_user_per_percentile, {"count":value}) 
    File "/home/auduwage/code/vInterLang/local/lib/python2.7/site-packages/MySQLdb/cursors.py", line 201, in execute 
    self.errorhandler(self, exc, value) 
    File "/home/auduwage/code/vInterLang/local/lib/python2.7/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler 
    raise errorclass, errorvalue 
_mysql_exceptions.ProgrammingError: (2014, "Commands out of sync; you can't run this command now") 
Exception _mysql_exceptions.ProgrammingError: (2014, "Commands out of sync; you can't run this command now") in <bound method SSDictCursor.__del__ of <MySQLdb.cursors.SSDictCursor object at 0x2716ed0>> ignored

在此之前，我在不同的方法中使用了相同的遊標，我不認爲這與MySql有關，不允許我使用相同的遊標一個接一個地運行多個查詢？還是它？什麼是解決方案？

來源

2013-10-10 Null-Hypothesis

您無法運行復合sql語句。你需要將它們分開。

這將返回該錯誤：

cursor.execute("drop database x; drop table y;")

這將很好地工作：

cursor.execute("drop database x;") 
cursor.execute("drop table y;")

來源

2013-12-12 22:39:11 panofish

Python MySQLdb處理多個遊標：命令不同步

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