The used command is not allowed with this MySQL version - How to solve MySQL error: This MySQL version does not allow the use of this command

When using the MySQL database, we often encounter various errors and problems. One of the common errors is: "The used command is not allowed with this MySQL version" (This MySQL version does not allow the use of the command). This error may occur when we execute certain MySQL commands.

This article will detail how to solve this problem and provide specific code examples.

First, let’s see why this error occurs. When we use a database with a newer version of MySQL, some specific commands may have been deprecated or removed. This means that we can no longer use these commands, otherwise we will get the above error message.

To solve this problem, there are several methods you can try.

The first method is to use compatibility mode. MySQL provides a compatibility mode in which we can use some deprecated commands. We can enable this mode by adding specific options when connecting to the MySQL database.

The following is a specific code example:

import mysql.connector

config = {
  'user': 'your_username',
  'password': 'your_password',
  'host': '127.0.0.1',
  'database': 'your_database',
  'raise_on_warnings': True,
  'use_pure': False
}

cnx = mysql.connector.connect(**config, sql_mode='MYSQL323')

In the above code, we enable compatibility by setting the sql_mode parameter to MYSQL323 sexual pattern. This value tells MySQL to use the compatibility mode of MySQL 3.23.x versions. Please note that this method only works in some specific situations and specific commands.

The second method is to modify our code to adapt to the MySQL version. If a command is removed or replaced with another command in a newer version of MySQL, we need to modify our code to use the new command or method.

The following is a specific code example:

import mysql.connector

config = {
  'user': 'your_username',
  'password': 'your_password',
  'host': '127.0.0.1',
  'database': 'your_database',
  'raise_on_warnings': True,
  'use_pure': False
}

cnx = mysql.connector.connect(**config)

cursor = cnx.cursor()

# 修改命令，以适应新的MySQL版本
cursor.execute("SELECT * FROM your_table")

for row in cursor:
    print(row)

cursor.close()
cnx.close()

In the above code, we use the SELECT * FROM your_table command to query the database without using the deprecated The command. Depending on the specific situation and needs, we need to modify our code to adapt to the new MySQL version.

The third method is to upgrade the MySQL database. If our database version is too old and is no longer supported, then we may want to consider upgrading our MySQL version. Upgrading to a newer version will enable us to use the latest commands and features, thus avoiding this error.

In addition to the above methods, we should also check the MySQL version documentation and official website to get the latest information about specific commands and functions. This will help us understand which commands are deprecated or removed and how to replace them.

In short, when encountering the MySQL error: "The used command is not allowed with this MySQL version", we can try to use compatibility mode, modify the code to adapt to the new MySQL version, or consider upgrading the MySQL database . At the same time, we should also check the MySQL version documentation to learn about the latest available commands and functions.

I hope this article can help readers solve this common MySQL error and provide specific code examples. I wish you good luck with your MySQL database!

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