Error
Error Code:
3175
MySQL Error 3175: Virtual Column Index Conflict
Description
This error occurs when you attempt to create an index on a virtual (generated) column, but the original column from which the virtual column's value is derived is already part of a foreign key constraint. MySQL prohibits this configuration to maintain data integrity and avoid complex referential action interactions.
Error Message
Cannot create index on virtual column whose base column has foreign constraint.
Known Causes
3 known causesIndexing a Virtual Column
You are attempting to define an index on a generated (virtual) column within your table schema.
Foreign Key on Base Column
The base column, from which your virtual column derives its value, is already involved in a foreign key relationship, referencing another table.
Incompatible Schema Design
Your database schema design attempts to combine virtual column indexing with foreign key constraints on the base column, which is an unsupported configuration in MySQL.
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