Error
Error Code:
1486
MariaDB Error 1486: Invalid Partitioning Function Expression
Description
This error occurs when you attempt to define a table's partitions or subpartitions using an expression that MariaDB deems non-deterministic or invalid for partitioning purposes. The partitioning function requires a stable and predictable input to correctly distribute data, disallowing expressions that change their value or are not constant within the partitioning context.
Error Message
Constant/Random expression in (sub)partitioning function is not allowed
Known Causes
3 known causesUsing Non-Deterministic Functions
Functions like RAND(), NOW(), UUID(), or custom functions that produce varying results with each call are prohibited in partitioning expressions. The partitioning key must be consistently derivable for data integrity.
Incorrect Literal Constant Usage
While constants can be part of an expression, using a literal constant as the sole or primary partitioning expression in a way that doesn't facilitate proper data distribution can lead to this error.
Complex or Invalid SQL Expressions
Attempting to use overly complex SQL expressions, subqueries, or constructs that MariaDB cannot reliably evaluate as a single, stable value for the partitioning key will trigger this error.
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