3412
MySQLERRORNotablePartitioningHIGH confidence
Wrong number of partitions for HASH partitioning
Production Risk
Low — DDL fails; no table is created.
How to reproduce
trigger — this will error
trigger — this will error
CREATE TABLE t (id INT) PARTITION BY HASH(id) PARTITIONS 0;
expected output
ERROR 3412 (HY000): Incorrect number of partitions for HASH partitioning.
Fix
Use a positive partition count
Use a positive partition count
CREATE TABLE t (id INT) PARTITION BY HASH(id) PARTITIONS 4;
Why this works
A positive partition count is required for HASH partitioning to distribute rows.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3412 ER_WRONG_PARTITIONS_HASH
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