Error
Error Code:
1515
MariaDB Error 1515: Missing Partition to Coalesce
Description
This error occurs when attempting to coalesce (reduce) partitions in a partitioned table, but the operation cannot proceed because there aren't enough partitions to merge or the specified partition count is invalid. It typically indicates an attempt to reduce partitions when the table is already at its minimum partition count or the target reduction would result in fewer than the minimum allowed partitions.
Error Message
At least one partition must be coalesced
Known Causes
3 known causesInsufficient Partitions Exist
The table targeted for partition coalescing already has the minimum number of partitions, making further reduction impossible or invalid for the requested operation.
Invalid Partition Count for Coalesce
The number of partitions specified in the `COALESCE PARTITION` clause is incorrect or would lead to an invalid state, such as reducing the table to zero partitions.
Misunderstanding Coalesce Operation
The `ALTER TABLE ... COALESCE PARTITION` statement was used with an incorrect understanding of its effect or the current table's partition structure.
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