EC
1515
MariaDBERRORNotablePartitioningHIGH confidence

Cannot remove all partitions — use DROP TABLE instead

Production Risk

Low — the DROP PARTITION fails; choose the correct alternative.

What this means

ER_DROP_LAST_PARTITION (1515, SQLSTATE HY000) is raised when attempting to DROP the last remaining partition of a partitioned table.

Why it happens
  1. 1ALTER TABLE DROP PARTITION would remove all partitions, leaving a partitioned table with no partitions
How to reproduce
trigger — this will error
trigger — this will error
-- Table has only one partition p0:
ALTER TABLE t DROP PARTITION p0;  -- Would leave 0 partitions

expected output

ERROR 1515 (HY000): Cannot remove all partitions, use DROP TABLE instead

Fix

Use DROP TABLE or REMOVE PARTITIONING

Use DROP TABLE or REMOVE PARTITIONING
-- To delete the table entirely:
DROP TABLE t;

-- To remove partitioning but keep data:
ALTER TABLE t REMOVE PARTITIONING;

Why this works

A partitioned table cannot have zero partitions; either drop the entire table or remove partitioning.

Sources
Official documentation ↗

MySQL 8.0 — 1515 ER_DROP_LAST_PARTITION

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