Error 1273 but my schema don't contain utf8mb4_0900_ai_ci

Question

I have developed an app in python with SQLAlchemy. My MySQL test database is in version 8.0 and my product database is in 5.7. I did the migration between the database and there is no error. But when I connect to the product database, I obtain the error "1273 (HY000): Unknown collation: ‘utf8mb4_0900_ai_ci’".

However, my structure don’t contain "utf8mb4_0900_ai_ci". There is only "utf8mb4_general_ci".
I specify that this error occurs only when I connect to the product database.

Connection to database:

engine = create_engine('mysql+mysqlconnector://user:***********@**********:3306/amatdb?charset=utf8mb4')

SQL example

DROP TABLE IF EXISTS `alembic_version`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!50503 SET character_set_client = utf8mb4 */;
CREATE TABLE `alembic_version` (
  `version_num` varchar(32) NOT NULL,
  PRIMARY KEY (`version_num`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_general_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

Thank you in advance for your help

Asked By: Rayon Magique

||

Source

Answer 1

Fixed : Just add "&collation=utf8mb4_general_ci’"

engine=create_engine('mysql+mysqlconnector://user:***********@**********:3306/amatdbcharset=utf8mb4&collation=utf8mb4_general_ci')

Answered By: Rayon Magique

Answer 2

If you are using Flask with Flask-SQLAlchemy, then the create_engine() method couldn’t be accessed and changed easily (I didn’t find any way to do that). Then the workaround is to change the connector version to 8.0.16

mysql-connector-python==8.0.16

The default collation utf8mb4_0900_ai_ci was set in the version 8.0.17, so it works if you use any version before 8.0.17

Answered By: Muhammad Talha

Answer 3

If you are using xampp maria db, just change the version of mysql connector to an older one, prior to version 8.0.17 that will work

Answered By: Landim013

Error 1273 but my schema don't contain utf8mb4_0900_ai_ci

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