MySQL Error 1025: How to Resolve 'Error on Rename' Issues with Foreign Key Constraints?

MySQL Error 1025: Unraveling the Mystery

When executing SQL statements involving table modifications, you may encounter error messages like "Error on rename." This article will shed light on MySQL error 1025, specifically focusing on the context of table alterations and foreign key constraints.

The error message "ERROR 1025 (HY000): Error on rename of './product/#sql-14ae_81' to '/product/region' (errno: 150)" often arises when working with InnoDB tables. In such cases, it's crucial to understand the role of foreign key constraints.

To resolve this issue, you'll need to remove the foreign key constraint before performing the table alteration. However, you can't drop the constraint directly by referencing the column name. Instead, you must identify the index name associated with the foreign key.

Run the following query to retrieve this information:

SHOW CREATE TABLE region;

The output will display the foreign key constraint details, including the index name. For instance:

CONSTRAINT region_ibfk_1 FOREIGN
KEY (country_id) REFERENCES
country (id) ON DELETE NO
ACTION ON UPDATE NO ACTION

Once you have the index name, execute these commands:

alter table region drop foreign key region_ibfk_1;
alter table region drop column country_id;

By following these steps, you can successfully perform the table alterations and resolve MySQL error 1025.

The above is the detailed content of MySQL Error 1025: How to Resolve 'Error on Rename' Issues with Foreign Key Constraints?. For more information, please follow other related articles on the PHP Chinese website!