3419
MySQLERRORNotablePartitioningHIGH confidence
Wrong number of subpartition data values
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, dt DATE) PARTITION BY RANGE(YEAR(dt)) SUBPARTITION BY HASH(id) SUBPARTITIONS 4 (PARTITION p0 VALUES LESS THAN (2020) (SUBPARTITION s0, SUBPARTITION s1));
expected output
ERROR 3419 (HY000): Wrong number of subpartition definitions.
Fix
Match subpartition count to SUBPARTITIONS clause
Match subpartition count to SUBPARTITIONS clause
CREATE TABLE t (id INT, dt DATE) PARTITION BY RANGE(YEAR(dt)) SUBPARTITION BY HASH(id) SUBPARTITIONS 2 (PARTITION p0 VALUES LESS THAN (2020) (SUBPARTITION s0, SUBPARTITION s1));
Why this works
SUBPARTITIONS 2 matches the two explicitly named subpartitions s0 and s1.
What not to do
✕
Sources
Official documentation ↗
MySQL 8.0 — 3419 ER_PARTITION_WRONG_NO_SUBPART_DATA
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