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Description

This error indicates that a row being processed (inserted, updated, or selected) does not fit into any of the defined partitions for the table. It commonly occurs when the data in the partition key column(s) falls outside the ranges or values specified by the table's partitioning scheme.

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Error Message

Found a row not matching the given partition set

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Known Causes

3 known causes

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Data Violates Partition Boundaries

The values in the partition key columns of a row do not map to any existing partition, falling outside defined ranges or lists.

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Incorrect Partitioning Scheme

The table's partitioning definition is flawed or incomplete, failing to cover all possible data values for the partition key.

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Missing or Dropped Partition

A required partition that would accommodate the row's partition key value was never created or has been inadvertently dropped.

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Solutions

3 solutions available

1. Correct Data for Partitioning easy

Ensure inserted or updated data conforms to the table's partitioning scheme.

1

Identify the partitioning scheme of the table. 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';

2

Analyze the `PARTITION_EXPRESSION` to understand the rules for data distribution. For example, if it's `RANGE (column_name)`, understand the defined ranges.

e.g., RANGE (year(date_column)) means data is partitioned by year.

3

Examine the data you are trying to insert or update. Ensure the values in the partitioning column(s) fall within the expected ranges or sets defined by the partitions.

For example, if partitioning is by year and you are trying to insert a record for the year 2050, but no partition exists for that year, you will get this error.

4

Modify your `INSERT` or `UPDATE` statements to use values that match the existing partitions or create new partitions if necessary (see Solution 2).

Example: If partitioning is by `year(order_date)` and you have partitions for 2022, 2023, 2024, ensure your `order_date` values fall into one of these years.

2. Add or Reorganize Partitions medium

Dynamically adjust the table's partitions to accommodate new data.

1

Determine the missing partition range or set based on the error message and your data. This often involves looking at the value that failed to match.

The error message itself might hint at the problematic value or range. If not, inspect the data causing the error.

2

Use the `ALTER TABLE ... ADD PARTITION` statement to create the necessary partition. The syntax depends on the partitioning type (RANGE, LIST, HASH, KEY).

For RANGE partitioning by year:
ALTER TABLE your_table_name ADD PARTITION (PARTITION p2025 VALUES LESS THAN (2026));

For LIST partitioning by status:
ALTER TABLE your_table_name ADD PARTITION (PARTITION p_active VALUES IN ('active'));

3

If the partitioning scheme needs a more significant overhaul (e.g., changing the partitioning key or expression), you might need to rebuild the table. This is a more complex operation and requires downtime.

This involves creating a new table with the desired partitioning, copying data, and then swapping tables. Consult MariaDB documentation for detailed procedures on `ALTER TABLE ... PARTITION BY ...`.

4

After adding partitions, retry the `INSERT` or `UPDATE` operation that failed.

3. Disable Partitioning Temporarily for Data Migration medium

A temporary measure to insert data when partitioning rules are complex or unknown.

1

Backup your data before proceeding. This is a critical step for any schema modification.

mysqldump -u your_user -p your_database_name your_table_name > table_backup.sql

2

Temporarily drop the partitioning from the table. This will make it a regular table, allowing any data to be inserted.

ALTER TABLE your_table_name REMOVE PARTITIONING;

3

Perform your data insertion or migration operations. Now, the row-matching error should not occur.

4

Once data migration is complete, re-apply partitioning. This might involve creating a new table with the desired partitioning and copying data, or using `ALTER TABLE ... PARTITION BY ...` if MariaDB version supports it directly without data loss (check documentation).

Refer to MariaDB documentation for the exact syntax for re-partitioning a table. Often, this involves creating a new table and migrating data. For example:
CREATE TABLE your_table_name_new (
  ... columns ...
) PARTITION BY ... ;
INSERT INTO your_table_name_new SELECT * FROM your_table_name;
RENAME TABLE your_table_name TO your_table_name_old, your_table_name_new TO your_table_name;

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Related Errors

5 related errors

MariaDB Error 1748: Row Fails Partition Set Match