Error
Error Code:
1491
MariaDB Error 1491: Invalid Partition Function Type
Description
This error occurs when a function specified for table partitioning returns a data type that is not permitted for partitioning keys. MariaDB requires partitioning functions to return integer values to correctly map rows to partitions. It typically appears during `CREATE TABLE` or `ALTER TABLE` statements involving partitioned tables.
Error Message
The %s function returns the wrong type
Known Causes
3 known causesFunction Returns Non-Integer
The user-defined or built-in function used in the `PARTITION BY` expression produces a result that is not an integer type, which is required for partitioning.
Using Disallowed Functions
Attempting to use a function that is explicitly restricted from use in `PARTITION BY` clauses, even if it might return an integer.
Partitioning Expression Type Mismatch
The overall expression within the `PARTITION BY` clause evaluates to a non-integer data type, making it unsuitable for partition key calculation.
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