<p>MySQL raises error 1505 when a partition management statement targets a table that is not partitioned.</p>
<p>MySQL Error 1505 ER_PARTITION_MGMT_ON_NONPARTITIONED occurs when you run ADD, DROP, or REORGANIZE PARTITION on a table that lacks partitions. Convert the table with PARTITION BY or remove the command to fix the issue.</p>
Partition management on a not partitioned table is not
The exact error message is: Partition management on a not partitioned table is not possible. MySQL raises it when you execute a partition management statement on a table that was created without a PARTITION BY clause.
The server aborts the DDL, leaving the schema unchanged. Fixing the error quickly is critical because failed migrations can halt CI/CD pipelines and delay releases.
The primary trigger is running ALTER TABLE ... ADD PARTITION, DROP PARTITION, REORGANIZE PARTITION, or REMOVE PARTITIONING against a table that lacks partition metadata.
The error also appears after a table is rebuilt as a regular table while legacy maintenance scripts still reference partition operations.
Template code reuse, copy-paste mistakes, and missing conditional checks in automation frequently surface the error.
First, confirm whether the table should be partitioned by querying INFORMATION_SCHEMA.PARTITIONS.
If partitioning is desired, recreate or alter the table with a proper PARTITION BY clause and then run your maintenance commands.
If the table is intentionally non partitioned, remove the partition statement or wrap it in a conditional guard so it executes only on partitioned tables.
CI/CD migration fails: ensure the migration creates the table with PARTITION BY before any ADD PARTITION statements.
Automated monthly partition script fails: embed a check that skips tables without partitions.
Manual DBA operation: run SHOW CREATE TABLE to inspect the definition and decide whether to add partitioning or drop the command.
Version control all DDL and document which tables are partitioned.
Centralize partition maintenance procedures and parameterize them to target only approved tables.
Monitor schema changes and audit DDL to catch tables that lose partitioning unexpectedly.
ER_PARTITION_FUNCTION_IS_NOT_ALLOWED: occurs when the partition key uses an unsupported function. Define partition key columns directly.
ER_PARTITION_FIELD_GET_TABLE: raised when the partition clause references a non existing column. Verify column names.
ER_DROP_PARTITION_NON_EXISTENT: appears when dropping a partition that does not exist. Query INFORMATION_SCHEMA.PARTITIONS first.
Maintenance scripts or manual commands assume the table is partitioned and issue ALTER TABLE ... ADD PARTITION, triggering the error.
A table was once partitioned, then rebuilt without partitions, yet old jobs still execute partition maintenance.
Developers reuse DDL snippets without confirming the target table definition, leading to mismatched partition commands.
Raised when a forbidden function is used in the partition key. Use supported expressions or columns instead.
Occurs when the partition clause references a column that does not exist in the table.
Triggered when attempting to drop a partition that is not present. Always list partitions first.
Yes. From MySQL 8.0.13 onward you can use ALTER TABLE ... PARTITION BY to convert an existing table in place, but expect a full table lock.
No rows are modified or lost. The DDL simply fails, leaving the table untouched.
Query INFORMATION_SCHEMA.PARTITIONS grouped by TABLE_NAME, or use SHOW CREATE TABLE for a single table.
Galaxy highlights partition clauses during review and lets teams endorse schema scripts, reducing accidental partition commands on non partitioned tables.
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