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Description

MySQL Error 1521 occurs when you attempt to create or alter a partitioned table using a partition function or method that is not supported by your current MySQL server version or the specified storage engine. This error prevents the table operation from completing successfully.

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Error Message

Partition function not supported in this version for this handler

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Known Causes

3 known causes

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Incompatible MySQL Version

Attempting to use a partitioning function or feature that was introduced in a newer MySQL server version than the one you are currently running.

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Unsupported Storage Engine

The chosen storage engine for the partitioned table (e.g., MyISAM, InnoDB) does not support the specific partitioning method or function being applied.

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Incorrect Partition Syntax

The SQL statement for creating or altering the partitioned table contains a syntax error in the partition definition, leading to an unrecognized or unsupported function.

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Solutions

3 solutions available

1. Verify MySQL Version and Partitioning Support easy

Ensure your MySQL version supports the specific partitioning function used.

1

Check your current MySQL server version. You can do this by connecting to your MySQL server and running the following command:

SELECT VERSION();

2

Consult the official MySQL documentation for your specific version to confirm which partitioning functions are supported. Pay close attention to the documentation for the storage engine you are using (e.g., InnoDB, MyISAM). You can typically find this by searching for 'MySQL [your_version] partitioning' online.

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3

If your version does not support the function, you will need to upgrade your MySQL server or use a supported partitioning method.

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2. Adjust Partitioning Scheme to Supported Function medium

Modify the table's partitioning to use a function that is compatible with your MySQL version and handler.

1

Identify the exact partitioning function being used in your `CREATE TABLE` or `ALTER TABLE` statement that is causing the error.

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2

Review the MySQL documentation for your version to find an alternative, supported partitioning function (e.g., RANGE, LIST, HASH, KEY).

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3

If possible, use a simpler or more universally supported partitioning type. For example, if you're using a complex user-defined function for partitioning, consider switching to RANGE or LIST partitioning.

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4

Recreate or alter the table using the supported partitioning function. This often involves dropping the table (after backing up data), and recreating it with the corrected partitioning clause.

CREATE TABLE your_table (
    id INT NOT NULL,
    data VARCHAR(255),
    created_at DATETIME
) PARTITION BY RANGE (YEAR(created_at)) (
    PARTITION p2022 VALUES LESS THAN (2023),
    PARTITION p2023 VALUES LESS THAN (2024),
    PARTITION p2024 VALUES LESS THAN MAXVALUE
);

3. Check Storage Engine Compatibility medium

Ensure the chosen storage engine supports the partitioning function being used.

1

Determine the storage engine of the table you are trying to partition. You can check this with:

SHOW CREATE TABLE your_table;

2

Consult the MySQL documentation for your version and the specific storage engine (e.g., InnoDB, MyISAM). Some storage engines have more limited partitioning support than others.

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3

If the storage engine does not support the desired partitioning function, consider switching to a storage engine that does (most commonly InnoDB for modern MySQL versions). Note that changing storage engines can have performance implications and might require data migration.

ALTER TABLE your_table ENGINE=InnoDB;

4

After changing the storage engine, re-attempt to create or alter the table with the desired partitioning.

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Related Errors

5 related errors

MySQL Error 1521: Unsupported Partition Function