1574
MariaDBERRORCriticalPartitioningHIGH confidence
Partition merge error
Production Risk
High — partition reorganization can affect data accessibility if not done correctly.
What this means
An error occurred while merging partitions, typically when reorganizing RANGE or LIST partitions.
Why it happens
- 1Trying to reorganize partitions in a way that would lose data boundaries.
- 2Incompatible partition definitions during REORGANIZE PARTITION.
How to reproduce
trigger — this will error
trigger — this will error
ALTER TABLE t REORGANIZE PARTITION p0, p1 INTO ( PARTITION p_new VALUES LESS THAN (50) );
expected output
ERROR 1574 (HY000): Merge of partition '%s' with error
Fix
Ensure new partition covers the full range of old partitions
Ensure new partition covers the full range of old partitions
-- New partition definition must encompass all rows from reorganized partitions. ALTER TABLE t REORGANIZE PARTITION p0, p1 INTO ( PARTITION p_new VALUES LESS THAN (200) );
Why this works
The new partition boundary must be at least as large as the highest boundary being merged.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 1574 ER_PARTITION_MERGE_ERROR
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