EC
1519
MySQLERRORNotablePartitioningHIGH confidence

REMOVE PARTITIONING can only be used on RANGE/LIST partitions

Production Risk

Low — the ALTER TABLE fails; use the correct command for the partition type.

What this means

ER_ONLY_ON_RANGE_LIST_PARTITION (1519, SQLSTATE HY000) is raised when certain partition management commands that only apply to RANGE/LIST partitions are used on HASH/KEY partitioned tables.

Why it happens
  1. 1ALTER TABLE DROP PARTITION on a HASH or KEY partitioned table
  2. 2Using commands specific to RANGE/LIST on HASH/KEY tables
How to reproduce
trigger — this will error
trigger — this will error
ALTER TABLE hash_table DROP PARTITION p0;
-- hash_table uses HASH partitioning

expected output

ERROR 1519 (HY000): REMOVE PARTITIONING can only be used on RANGE/LIST partitions

Fix

Use COALESCE PARTITION for HASH/KEY tables

Use COALESCE PARTITION for HASH/KEY tables
-- For HASH/KEY tables, use COALESCE to reduce partition count:
ALTER TABLE hash_table COALESCE PARTITION 1;

-- DROP PARTITION is only for RANGE/LIST:
ALTER TABLE range_table DROP PARTITION p_old;

Why this works

RANGE/LIST support DROP PARTITION; HASH/KEY uses COALESCE to reduce partitions.

Sources
Official documentation ↗

MySQL 8.0 — 1519 ER_ONLY_ON_RANGE_LIST_PARTITION

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