MySQL warns that a table still uses the deprecated PARTITION storage engine; switch to native partitioning to avoid future failures.
ER_PARTITION_ENGINE_DEPRECATED_FOR_TABLE (MySQL error 3194) means your table is defined with the old PARTITION storage engine slated for removal. Recreate or alter the table with a supported engine like InnoDB and add native PARTITION BY clauses to clear the warning.
ER_PARTITION_ENGINE_DEPRECATED_FOR_TABLE
Error 3194 fires when MySQL encounters a table that still references the historical PARTITION storage engine plugin. That plug-in sat on top of engines like MyISAM but was removed in MySQL 8.0. Native partitioning is now built directly into InnoDB and NDB.
The server raises the warning at CREATE, ALTER or even SELECT time to alert you that the table will become unreadable after the deprecated engine is dropped in a future release. Fixing it early prevents outage during upgrades.
The most common trigger is an outdated DDL statement that explicitly sets ENGINE=PARTITION, a syntax supported only in MySQL 5.7 and earlier. Importing mysqldump files generated from such servers reproduces the problem on modern versions.
Upgrades from 5.6 or early 5.7 may leave legacy tables untouched. Even if the table uses InnoDB for data, the presence of the PARTITION engine wrapper keeps the dependency alive and surfaces the deprecation notice.
Replace the PARTITION engine with a supported one (typically InnoDB) and declare native partitioning in the same statement. Use ALTER TABLE for in-place conversion or CREATE TABLE ... SELECT for a minimal-downtime rebuild.
After conversion, verify with SHOW CREATE TABLE that ENGINE=InnoDB (or another supported engine) and that partition clauses remain intact.
During migration to MySQL 8.0, the upgrade checker flags every deprecated partition table. Running the provided ALTER TABLE commands before the upgrade lets the process complete smoothly.
CI pipelines restoring old fixtures can fail when the server runs with PARTITION_ENGINE disabled. Updating fixture DDL or adding sql_mode=IGNORE_SPACE prevents broken builds.
Always specify a modern engine like InnoDB in CREATE TABLE statements and rely on PARTITION BY for sharding. Remove any ENGINE=PARTITION references from schema files and code generators.
Add an automated check in Galaxy or your migration tool that scans pull requests for deprecated engine keywords and blocks them before they reach production.
Error 3185 (ER_PARTITION_REQUIRES_PRIMARY_KEY) appears when a partitioned InnoDB table lacks a primary key. Add a PRIMARY KEY to resolve.
Error 1502 (ER_PARTITION_FUNCTION_IS_NOT_ALLOWED) occurs when the partitioning expression is not permitted. Adjust the partition expression to a column or function allowed by MySQL.
Legacy DDL containing ENGINE=PARTITION copied from MySQL 5.6/5.7 scripts.
Tables created by third-party tools that still default to the deprecated partition plugin.
Restoring old mysqldump backups on a modern MySQL server without preliminary sanitization.
Skipping mysql_upgrade after version jumps, leaving metadata unchanged.
Raised when an InnoDB partitioned table lacks a primary key. Add a primary key column to fix.
Appears when a disallowed function is used in the partition expression. Replace the expression with a supported column or function.
Triggered by invalid partition syntax. Review the PARTITION BY clause and correct typos or misplaced parentheses.
In current releases it is a warning, but future versions will refuse to open the table, making it fatal if left unaddressed.
Yes, you can start MySQL with --disable-partition-engine-plugin to surface all broken tables quickly, then convert them.
InnoDB provides full support for RANGE, LIST, HASH and KEY partitioning, matching or exceeding the deprecated plugin's capabilities.
Galaxy's schema-aware AI flags deprecated ENGINE=PARTITION in pull requests and autogenerates the correct ALTER TABLE statement, preventing the warning from reaching production.
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