Error
Error Code:
3522
MySQL Error 3522: Primary Key Index Invisible
Description
This error occurs when attempting to create or alter a table and define its primary key index as invisible. MySQL explicitly prevents primary key indexes from being invisible because they are fundamental for data integrity, uniqueness enforcement, and efficient query optimization. Making a primary key invisible would undermine its core functionality.
Error Message
A primary key index cannot be invisible
Known Causes
3 known causesExplicit Invisible Primary Key Definition
Attempting to create a new table or add a primary key constraint, explicitly specifying the `INVISIBLE` attribute for the primary key index.
Altering Existing Primary Key to Invisible
Executing an `ALTER TABLE` statement to modify an existing primary key index, attempting to change its visibility status to `INVISIBLE`.
Incorrect DDL Generation by Tools
A database management tool, ORM, or migration script generates DDL (Data Definition Language) that includes an `INVISIBLE` clause for a primary key.
Solutions
Coming SoonDetailed step-by-step solutions for this error are being prepared. In the meantime, try these general troubleshooting tips:
General Troubleshooting Tips
- Check the error message carefully for specific details
- Review recent changes that might have caused the error
- Search for the exact error code in the official documentation
- Check log files for additional context
- Try restarting the application or service