MySQL 1230: Duplicate partition key.

What is MySQL 1230: Duplicate partition key.

When encountering the error `1230: Duplicate partition key` in MySQL, the immediate actions to take are:

Identify the query causing the error. Review the application logs or MySQL query logs to find the exact query that failed.

Examine the table schema, especially the partitioning scheme. Use the command:

SHOW CREATE TABLE yourtablename;

Check the existing partitions and their values using:

SELECT PARTITIONNAME, PARTITIONEXPRESSION, PARTITIONDESCRIPTION FROM INFORMATIONSCHEMA.PARTITIONS WHERE TABLENAME = 'yourtablename' AND TABLESCHEMA = 'yourdatabasename';

Compare the values you're trying to insert with the partition definitions to understand why the duplicate partition key error is occurring.

If the error is due to a wrong value being inserted (not aligning with the partition scheme), adjust the insert value accordingly.

If necessary, adjust the partitioning scheme to accommodate the new data. This might involve redefining partition boundaries with `ALTER TABLE` commands, such as adding new partitions:

ALTER TABLE yourtablename REORGANIZE PARTITION partitiontosplit INTO (PARTITION newpartition VALUES LESS THAN (value), PARTITION partitionto_split VALUES LESS THAN MAXVALUE); Or modifying existing partitions:ALTER TABLE yourtablename ADD PARTITION (PARTITION new_partition VALUES LESS THAN (value));Remember to replace `yourtablename`, `yourdatabasename`, `partitiontosplit`, `new_partition`, and `value` with your specific table name, database name, partition names, and partition values.