<p>The error appears when REORGANIZE PARTITION is issued without partition parameters on a table that is not auto-partitioned by HASH.</p>
<p>ER_REORG_NO_PARAM_ERROR (MySQL 1511) occurs when you issue REORGANIZE PARTITION without listing new partitions on a table that is not auto-partitioned with HASH. Supply explicit partition definitions or convert the table to PARTITION BY HASH to resolve the error.</p>
REORGANIZE PARTITION without parameters can only be used
MySQL throws error 1511 with the message 'REORGANIZE PARTITION without parameters can only be used on auto-partitioned tables using HASH PARTITIONs' when you run ALTER TABLE … REORGANIZE PARTITION but omit the partition list.
Without explicit parameters, MySQL can reorganize partitions only when the table was created with automatic HASH partitioning. Any other partition type or a non-partitioned table triggers the error and stops the DDL operation.
The main trigger is a REORGANIZE PARTITION statement lacking the INTO clause that defines the new partitions. When the table uses RANGE, LIST, KEY, or manual HASH partitions, MySQL requires those definitions.
The error also appears if the table is not partitioned at all, or if past scripts removed HASH auto-partitioning settings, leaving the maintenance task outdated.
Provide explicit partition definitions after the INTO keyword, matching your desired layout. Alternatively, change the table to PARTITION BY HASH so that no parameters are needed in future reorganizations.
Always test the ALTER TABLE statement in a staging environment and ensure disk space is sufficient before reorganizing large tables.
Deployment scripts that assume HASH auto-partitioning fail after a schema refactor. Update the script to include new partition ranges.
Maintenance jobs executed in Galaxy’s SQL editor surface the error immediately. Use Galaxy’s version history to locate the last successful DDL and adjust parameters.
Create tables with well-planned partitioning strategies and document them in shared collections so teammates know which syntax to use.
Automate schema checks in CI pipelines. A quick SHOW CREATE TABLE before running DDL validates that expected partitioning matches the script.
Error 1505 ER_PARTITION_WRONG_NO_PART_ERROR signals a missing partition name, while 1507 ER_DROP_PARTITION_NON_EXISTENT occurs when attempting to drop partitions that are not present. Both require verifying partition lists before running ALTER TABLE.
Studying these messages together helps build a robust partition maintenance playbook and reduces unexpected downtime.
The REORGANIZE PARTITION statement lacks the INTO clause that lists new partitions, so MySQL cannot determine how to redistribute data.
The target table was created without any partition definition, making any REORGANIZE attempt invalid.
The table uses RANGE, LIST, KEY, or manual HASH partitions, but the command relies on HASH auto-partitioning behavior.
Old scripts assume earlier HASH partitioning. Schema changes removed that setup, causing current runs to fail.
Raised when a partition number is missing or out of range in ALTER TABLE statements.
Occurs when attempting to drop partitions that do not exist. Verify partition names before executing.
Triggers when partition management commands are run on a non-partitioned table.
Yes. The behavior is the same in MySQL 5.7 and 8.0 because partition syntax rules did not change.
No. Only HASH auto-partitioned tables support REORGANIZE PARTITION without the INTO clause.
Yes. MySQL rewrites the table. Ensure enough disk space and time during maintenance windows.
Galaxy surfaces syntax errors instantly, keeps a history of successful DDL, and lets teams share validated partition scripts to avoid future mistakes.
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