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Description

This error signifies that a data manipulation operation (e.g., INSERT, UPDATE) attempted to use a value for a partitioned table's key that does not correspond to any existing partition. MariaDB cannot determine where to store or retrieve the data because the value falls outside all defined partition ranges or lists.

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Error Message

Table has no partition for value %s

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Known Causes

3 known causes

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Out-of-Range Partition Value

The value being inserted or updated for the partition key does not fall within any of the defined ranges or is not present in any of the lists of existing partitions.

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Mismatched Partitioning Logic

The partitioning function or expression used to define the table's partitions does not correctly account for the data values being processed, leading to an unmappable value.

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Missing or Dropped Partition

A partition that should have handled the given value might have been accidentally dropped or was never created, leaving a gap in the partition scheme.

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Solutions

3 solutions available

1. Insert into a Known Partition easy

Directly insert data into a partition that is defined for the given value.

1

Identify the value that is causing the error. This will be provided in the error message (e.g., `%s`).

2

Examine your table's partitioning scheme to determine which partition is designed to handle this specific value. You can do this by querying the `information_schema.PARTITIONS` table.

SELECT PARTITION_NAME, PARTITION_METHOD, PARTITION_EXPRESSION FROM information_schema.PARTITIONS WHERE TABLE_SCHEMA = 'your_database_name' AND TABLE_NAME = 'your_table_name';

3

Once you've identified the correct partition, use the `PARTITION()` clause in your `INSERT` statement to explicitly target that partition.

INSERT INTO your_table_name PARTITION(partition_name_for_the_value) (column1, column2, ...) VALUES (value1, value2, ...);

2. Modify Partitioning to Include the Value medium

Alter the table's partitioning to accommodate the new value.

1

Determine the specific value that is failing to be mapped. This is usually shown in the error message.

2

Analyze your current partitioning strategy. For example, if you're using `RANGE` partitioning, you might need to add a new partition or extend an existing one.

SHOW CREATE TABLE your_table_name;

3

Add a new partition that covers the problematic value. The exact syntax depends on your partitioning type (e.g., `RANGE`, `LIST`).

-- Example for RANGE partitioning:
ALTER TABLE your_table_name ADD PARTITION (PARTITION p_new VALUES LESS THAN (your_value_upper_bound));

-- Example for LIST partitioning:
ALTER TABLE your_table_name ADD PARTITION (PARTITION p_new VALUES IN (the_specific_value));

4

If the value should fall into an existing partition, you might need to modify its boundaries. Be cautious with this, as it can involve data movement.

-- Example for RANGE partitioning (use with caution):
ALTER TABLE your_table_name REORGANIZE PARTITION existing_partition_name INTO (
    PARTITION existing_partition_name VALUES LESS THAN (new_upper_bound),
    PARTITION p_new VALUES LESS THAN (original_upper_bound)
);

3. Re-evaluate Partitioning Strategy for New Data advanced

If this error occurs frequently with new data, the partitioning scheme might be too restrictive.

1

Log the values that are causing the 'Value Not Mapped to Partition' error over time.

CREATE TABLE error_log (error_time TIMESTAMP DEFAULT CURRENT_TIMESTAMP, offending_value VARCHAR(255));
-- In your application or script that inserts data, wrap inserts in a try-catch block and log the value on error.

2

Analyze the logged values to identify patterns or a range of values that are not being covered by existing partitions.

SELECT offending_value, COUNT(*) FROM error_log GROUP BY offending_value ORDER BY COUNT(*) DESC;

3

Based on the analysis, redesign your partitioning scheme. This might involve creating more granular partitions, using a different partitioning type (e.g., `HASH` if the distribution is more uniform), or adjusting the partition expressions.

-- Example: If you have many values between 100 and 200 failing, consider adding a partition for that range.
ALTER TABLE your_table_name ADD PARTITION (PARTITION p_100_200 VALUES LESS THAN (200));

4

After modifying the partitioning, you may need to reassign existing data to the new partitions. This is a more involved process and might require downtime or careful planning.

ALTER TABLE your_table_name REORGANIZE PARTITION ...;

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Related Errors

5 related errors

MariaDB Error 1526: Value Not Mapped to Partition