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Description

This error occurs in MySQL when attempting to reorganize partitions in a partitioned table. It signifies that the `ALTER TABLE ... REORGANIZE PARTITION` statement specifies more partitions to reorganize than currently exist in the table, or references partitions that do not exist. This typically happens due to a mismatch between the desired partition structure and the current table definition.

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Error Message

More partitions to reorganize than there are partitions

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Known Causes

3 known causes

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Incorrect Partition List Syntax

The `ALTER TABLE ... REORGANIZE PARTITION` statement includes a partition list that is either too long or contains invalid references to existing partitions.

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Non-existent Partitions Specified

The command attempts to reorganize specific partitions by name, but one or more of the listed partition names do not exist in the table's current definition.

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Outdated Schema Knowledge

The user is attempting to reorganize partitions based on an outdated understanding or copy of the table's partitioning scheme, leading to an incorrect command.

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Solutions

4 solutions available

1. Correct Partition Reorganization Range easy

Ensure the partition reorganization range does not exceed the actual number of partitions.

1

Identify the table experiencing the error. Check the `ALTER TABLE ... REORGANIZE PARTITION` statement being executed.

2

Determine the total number of partitions for the target table. You can do this by querying the `INFORMATION_SCHEMA.PARTITIONS` table.

SELECT COUNT(*) FROM INFORMATION_SCHEMA.PARTITIONS WHERE TABLE_SCHEMA = 'your_database_name' AND TABLE_NAME = 'your_table_name';

3

Examine the `REORGANIZE PARTITION` clause in your `ALTER TABLE` statement. The `STARTING FROM` and `ENDING AT` clauses specify the range of partitions to be reorganized. Ensure that the number of partitions implied by this range (inclusive) does not exceed the total number of partitions found in the previous step.

4

Adjust the `STARTING FROM` and `ENDING AT` values to reflect a valid range within the existing partitions. For instance, if you have 10 partitions and the error occurs, and your statement was `REORGANIZE PARTITION STARTING FROM 1 ENDING AT 12`, you would adjust it to `ENDING AT 10` or a smaller valid range.

ALTER TABLE your_table_name REORGANIZE PARTITION STARTING FROM partition_start ENDING AT partition_end ... ;

2. Reorganize All Partitions Explicitly easy

If the intention is to reorganize all partitions, use the `ALL` keyword.

1

If your goal is to reorganize every partition in the table, use the `ALL` keyword instead of specifying a range.

ALTER TABLE your_table_name REORGANIZE PARTITION ALL STARTING PARTITION partition_name ENDING PARTITION partition_name ... ;

2

Replace `partition_name` with the name of the first and last partition if you want to reorganize a contiguous block including all. Alternatively, if you truly want to reorganize ALL partitions, and the error is due to an incorrect range count, simply using `ALL` might resolve it if the underlying issue is a miscalculation of the range.

ALTER TABLE your_table_name REORGANIZE PARTITION ALL ... ;

3. Verify Partition Definitions and Reorganize a Single Partition medium

Troubleshoot by verifying partition definitions and attempting to reorganize a single partition.

1

List all partitions of the table to understand their names and order.

SHOW CREATE TABLE your_table_name;

2

Carefully examine the output of `SHOW CREATE TABLE` for any inconsistencies or unexpected partition definitions.

3

As a diagnostic step, try reorganizing a single, known partition. This helps confirm if the issue is with range specification or a more fundamental problem with the partition definition.

ALTER TABLE your_table_name REORGANIZE PARTITION partition_name INTO (partition new_partition_definition) ... ;

4

If reorganizing a single partition succeeds, the problem lies in how you are defining the range for multiple partitions. If it fails, investigate the partition definition itself for errors.

4. Recreate Partitions if Definition is Corrupt advanced

If partition definitions are suspected to be corrupt, recreate them.

1

This is a more drastic solution and should only be considered if other methods fail and you suspect deep-seated issues with partition definitions.

2

Back up your data thoroughly before proceeding.

3

Drop all existing partitions. This will effectively un-partition the table.

ALTER TABLE your_table_name REMOVE PARTITIONING;

4

Re-apply the partitioning scheme with correct definitions. Ensure the number of partitions and their ranges are accurately defined.

ALTER TABLE your_table_name PARTITION BY ... (partition definition1, partition definition2, ...);

5

Once partitions are recreated, you can then proceed with reorganization if necessary, using a correctly defined range.

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Related Errors

5 related errors

MySQL Error 1516: Invalid Partition Reorganization Count