Error
Error Code:
1485
MySQL Error 1485: Subpartition Definition Mismatch
Description
This error indicates a discrepancy in the number of subpartitions defined for a table compared to its existing or previously specified partitioning scheme. It typically occurs during `ALTER TABLE` operations when modifying partitioning, or when attempting to create a table with an inconsistent subpartition definition.
Error Message
Wrong number of subpartitions defined, mismatch with previous setting
Known Causes
3 known causesInconsistent ALTER TABLE Statement
Attempting to modify a table's partitioning schema with an `ALTER TABLE` statement that specifies a different number of subpartitions than currently exist or are expected for the table's partitions.
Incorrect CREATE TABLE Definition
Defining a new table with a partitioning scheme where the number of subpartitions specified for its partitions is internally inconsistent or conflicts with MySQL's rules for valid partitioning.
Schema Mismatch During Restore
Restoring a table or database from a backup where the partitioning metadata, specifically the subpartition count, does not align with the current MySQL server's understanding or the intended schema.
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