<p>MySQL raises error 1747 when a PARTITION () clause is supplied on a table that is not defined as partitioned.</p>
<p>MySQL Error 1747: ER_PARTITION_CLAUSE_ON_NONPARTITIONED occurs when you include a PARTITION () clause on a table that lacks a PARTITION BY definition. Remove the clause or convert the table to a partitioned table to resolve the issue.</p>
PARTITION () clause on non partitioned table
Error 1747 - ER_PARTITION_CLAUSE_ON_NONPARTITIONED fires when MySQL encounters a PARTITION () clause on a table that has not been declared with a PARTITION BY strategy. The server cannot attach partition definitions to a non-partitioned table, so the statement is rejected.
The error often surfaces during ALTER TABLE operations that try to add, modify, or remove partitions, but it can also appear in CREATE TABLE statements that mistakenly include PARTITION () without a preceding PARTITION BY clause.
The error occurs in MySQL 5.1+ whenever the SQL parser sees a PARTITION () list while the target table definition is still non-partitioned. It is version-independent and triggered at compile time, so no data manipulation is attempted.
Leaving the statement unresolved prevents table creation or modification, halting deployments, migrations, or DDL automation pipelines. Resolving the error quickly is critical for CI/CD systems and schema versioning tools such as Galaxy’s migration runner.
Developers sometimes paste sample code that includes PARTITION definitions but forget the required PARTITION BY HASH|RANGE|LIST clause.
A legacy table is altered with ADD PARTITION or COALESCE PARTITION even though it was never partitioned in the first place.
Code-generation tools may emit PARTITION () blocks unconditionally, producing invalid DDL for tables that should remain unpartitioned.
DDL copied from a partitioned environment is applied to a non-partitioned replica, triggering the error during rollout.
Raised when the partitioning function is not deterministic or uses unsupported expressions.
Appears when MySQL encounters an invalid option inside the PARTITION clause.
Triggered when the COLUMNS partitioning list conflicts with table columns or data types.
Generated when a mix of partitioned and non-partitioned engines is used in replication under STATEMENT format.
Yes. Use ALTER TABLE table_name PARTITION BY ... to convert the table first, then add or reorganize partitions.
No. After ALTER TABLE ... REMOVE PARTITIONING the table becomes non-partitioned, but dropping individual partitions still leaves it partitioned until REMOVE PARTITIONING is executed.
InnoDB and NDB Cluster support partitioning. MyISAM supported it in older versions but is deprecated; other engines do not allow partitioning.
Galaxy highlights invalid PARTITION syntax in its SQL editor, offers AI-powered fixes, and blocks faulty migrations in team workflows, reducing production incidents.
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