Error
Error Code:
1517
MySQL Error 1517: Duplicate Partition Name
Description
Error 1517 occurs in MySQL when you attempt to create or modify a table with a partition using a name that is already in use by another partition within the same table. Partition names must be unique for each table, and this error indicates a violation of that uniqueness constraint during a DDL operation.
Error Message
Duplicate partition name %s
Known Causes
3 known causesAccidental Name Reuse
You attempted to define a new partition with a name already assigned to another partition within the same table, often due to a simple typo or oversight in your DDL statement.
Automated Script Error
An automated script or application logic tried to create a partition using a name that is not unique for the table, indicating a flaw in the script's naming generation or validation.
Copy-Paste DDL Mistake
When duplicating DDL statements for similar tables or partitions, the partition name was not updated, leading to a duplicate name within the same table definition.
Solutions
3 solutions available1. Rename the Duplicate Partition easy
Modify the table definition to use a unique name for the new partition.
1
Identify the table and the intended partition name that is causing the duplication.
2
Use the `ALTER TABLE ... PARTITION ...` statement to rename the partition. You'll need to specify the original name and the new, unique name.
ALTER TABLE your_table_name PARTITION BY RANGE (your_partition_column) (
PARTITION partition_name_1 ...,
PARTITION partition_name_2 ...,
PARTITION new_unique_partition_name VALUES LESS THAN (value) -- Replace with your desired partition definition
);3
If you are adding a new partition and encountering this error, simply choose a different, unused name for the new partition when defining it.
ALTER TABLE your_table_name ADD PARTITION (
PARTITION unique_partition_name VALUES LESS THAN (value)
);2. Remove the Existing Duplicate Partition medium
Delete the partition that is already using the desired name before adding a new one.
1
Identify the table and the partition name that is causing the conflict.
2
Use `SHOW CREATE TABLE your_table_name;` to list all existing partitions and their definitions.
SHOW CREATE TABLE your_table_name;3
Carefully review the output and identify the partition with the duplicate name. Ensure you are not deleting a critical partition.
4
Use the `ALTER TABLE ... DROP PARTITION` statement to remove the existing partition.
ALTER TABLE your_table_name DROP PARTITION existing_duplicate_partition_name;5
After dropping the duplicate partition, you can then add your new partition with the desired name.
ALTER TABLE your_table_name ADD PARTITION (
PARTITION your_desired_partition_name VALUES LESS THAN (value)
);3. Review and Correct Partitioning Strategy advanced
Re-evaluate your table's partitioning scheme to ensure logical and unique partition naming.
1
Understand the existing partitioning scheme for the table by running `SHOW CREATE TABLE your_table_name;`.
SHOW CREATE TABLE your_table_name;2
Analyze the names of all existing partitions. Are they descriptive and following a consistent naming convention?
3
If you are in the process of creating or modifying partitions, consider a naming convention that incorporates the partition key or range (e.g., `p_2023_01`, `range_1000`).
4
When adding new partitions, ensure the names are unique and do not conflict with any existing partitions or previously dropped partitions that might be implicitly considered in some older MySQL versions or specific scenarios.
ALTER TABLE your_table_name PARTITION BY RANGE (your_partition_column) (
PARTITION p_2023_01 VALUES LESS THAN (value1),
PARTITION p_2023_02 VALUES LESS THAN (value2),
PARTITION p_2023_03 VALUES LESS THAN (value3) -- Ensure 'p_2023_03' is not already in use
);5
If the conflict arises from a complex partitioning strategy or automated scripts, review the logic that generates partition names to prevent future duplicates.