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Description

This error occurs when the `ALTER TABLE ... REORGANIZE PARTITION` statement is executed without specifying which partitions to reorganize. MySQL allows this parameter-less form only for auto-partitioned tables using HASH partitioning; otherwise, explicit partition names are required.

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Error Message

REORGANIZE PARTITION without parameters can only be used on auto-partitioned tables using HASH PARTITIONs

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Known Causes

3 known causes

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Missing Partition Specification

Attempting to reorganize a table partitioned by RANGE, LIST, or KEY without explicitly naming the partitions to be reorganized in the `REORGANIZE PARTITION` clause.

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Incorrect Partitioning Type

The table being modified is not an auto-partitioned table using `HASH` partitioning, which is the only type that permits `REORGANIZE PARTITION` without parameters.

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Syntax Misapplication

The command syntax for `ALTER TABLE ... REORGANIZE PARTITION` was not correctly applied according to the table's specific partitioning scheme and MySQL version.

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Solutions

3 solutions available

1. Specify Partitioning Scheme for REORGANIZE easy

Explicitly define the partitioning strategy when reorganizing.

1

Identify the table causing the error. You can usually infer this from the context where the `REORGANIZE PARTITION` command was issued.

2

Determine the desired partitioning scheme for your table. If it's not already auto-partitioned with HASH, you'll need to define it. For example, to partition by RANGE on a date column:

ALTER TABLE your_table PARTITION BY RANGE (YEAR(date_column)) (
    PARTITION p2022 VALUES LESS THAN (2023),
    PARTITION p2023 VALUES LESS THAN (2024),
    PARTITION p2024 VALUES LESS THAN (2025)
);

3

Now, when you need to reorganize, specify the partitioning clause. For example, to reorganize all partitions:

ALTER TABLE your_table REORGANIZE PARTITION ALL WITH (
    PARTITION BY RANGE (YEAR(date_column)) (
        PARTITION p2022 VALUES LESS THAN (2023),
        PARTITION p2023 VALUES LESS THAN (2024),
        PARTITION p2024 VALUES LESS THAN (2025)
    )
);

4

If you are using HASH partitioning and want to reorganize, specify the number of partitions and the hashing column:

ALTER TABLE your_table REORGANIZE PARTITION ALL WITH (
    PARTITION BY HASH(your_column) PARTITIONS 8
);

2. Revert to Auto-Partitioning with HASH (if applicable) medium

If your table is intended for auto-partitioning with HASH, ensure it's configured correctly.

1

Verify if your table is indeed intended for auto-partitioning with HASH. Check the `CREATE TABLE` statement or use `SHOW CREATE TABLE your_table;` to inspect its definition.

SHOW CREATE TABLE your_table;

2

If the table is not explicitly defined with `PARTITION BY HASH`, and you want to use the auto-partitioning feature, you need to define it. This implies that the table was not initially created with `AUTO_PARTITION` enabled or with a HASH partitioning scheme.

ALTER TABLE your_table PARTITION BY HASH(your_column) AUTO_PARTITION;

3

Once the table is correctly configured for HASH auto-partitioning, you can attempt to reorganize without parameters. This is usually done for maintenance or to redistribute data evenly.

ALTER TABLE your_table REORGANIZE PARTITION ALL;

3. Recreate Table with Correct Partitioning advanced

For a clean slate, recreate the table with the desired partitioning strategy.

1

Back up your table data. This is a critical step to prevent data loss.

mysqldump -u your_user -p your_database your_table > your_table_backup.sql

2

Drop the existing table.

DROP TABLE your_table;

3

Recreate the table with the desired partitioning scheme. For example, to use HASH partitioning for auto-partitioning:

CREATE TABLE your_table (
    id INT AUTO_INCREMENT PRIMARY KEY,
    data VARCHAR(255)
) PARTITION BY HASH(id) AUTO_PARTITION;

4

Restore the data from the backup.

mysql -u your_user -p your_database < your_table_backup.sql

5

After the table is recreated and populated, you can then use `REORGANIZE PARTITION` without parameters if it's HASH auto-partitioned.

ALTER TABLE your_table REORGANIZE PARTITION ALL;

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Related Errors

5 related errors

MySQL Error 1511: REORGANIZE PARTITION Parameter Missing