Error
Error Code:
1090
MariaDB Error 1090: Deleting All Table Columns
Description
This error indicates an attempt to remove all columns from a database table using an `ALTER TABLE` statement. MariaDB prevents this operation to maintain data integrity and schema consistency, as an empty table schema is not a valid state for a table. It typically occurs when a user intends to completely remove a table but uses the wrong SQL command.
Error Message
You can't delete all columns with ALTER TABLE; use DROP TABLE instead
Known Causes
3 known causesIncorrect SQL Command Usage
The user intended to remove an entire table but mistakenly used `ALTER TABLE ... DROP COLUMN` for all columns instead of `DROP TABLE`.
Misunderstanding DDL Limitations
Lack of awareness that `ALTER TABLE` is designed for schema modifications, not for complete table removal, which requires `DROP TABLE`.
Automated Scripting Error
An automated script or application code generated an `ALTER TABLE` statement that inadvertently tried to drop all existing columns.
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