1781
MariaDBERRORNotableDDLHIGH confidence
ALTER TABLE INPLACE not supported with partitioning change
Production Risk
Low — DDL rejected.
What this means
The ALTER TABLE operation modifies the partitioning scheme, which is not supported with ALGORITHM=INPLACE.
Why it happens
- 1Adding, dropping, or reorganising partitions using ALGORITHM=INPLACE.
How to reproduce
trigger — this will error
trigger — this will error
ALTER TABLE tbl ALGORITHM=INPLACE, ADD PARTITION (PARTITION p_new VALUES LESS THAN (2025));
expected output
ERROR 1781 (0A000): ALGORITHM=INPLACE is not supported. Reason: Partition specific operations do not yet support ALGORITHM=INPLACE.
Fix
Remove the ALGORITHM=INPLACE hint for partition operations
Remove the ALGORITHM=INPLACE hint for partition operations
ALTER TABLE tbl ADD PARTITION (PARTITION p_new VALUES LESS THAN (2025));
Why this works
Partition DDL uses its own optimised path without needing an explicit algorithm hint.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 1781 ER_ALTER_OPERATION_NOT_SUPPORTED_REASON_PARTITION
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