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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.
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