Error
Error Code:
1520
MySQL Error 1520: Invalid Range Partition Reorganization
Description
This error occurs in MySQL when attempting to reorganize `RANGE` partitions in a way that alters the total number of defined ranges. It specifically prevents adding or merging ranges, allowing only the extension of the very last partition's boundary. This indicates a structural change request that exceeds the `REORGANIZE PARTITION` command's capabilities for `RANGE` partitioning.
Error Message
Reorganize of range partitions cannot change total ranges except for last partition where it can extend the range
Known Causes
4 known causesAttempting to Add New Partitions
Trying to split an existing range partition into multiple new ones, which would increase the total number of partitions.
Attempting to Merge Partitions
Trying to combine two or more existing range partitions into a single one, which would decrease the total number of partitions.
Modifying Internal Range Definitions
Changing the `VALUES LESS THAN` clause for any partition other than the last one in a way that alters the overall range structure.
Misunderstanding Reorganization Scope
Applying `ALTER TABLE ... REORGANIZE PARTITION` with an expectation of full structural redefinition beyond merely extending the last range.
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