Comments on: MySQL’s ERROR 1025 explained

By: C2 Web Design

C2 Web Design — Thu, 28 Jan 2010 12:18:01 +0000

MySql errors can often be a source of frustation so It is good that you have documented resolutions for some of them.

By: tison

tison — Fri, 06 Nov 2009 01:04:22 +0000

I was unable to delete the foreign key myself. I believe this issue was due to the fact that I forward engineered (created) the database using mysql work bench.

I simply re-created the tables (by copying the old ones), and i was then able to delete foreign keys without any problems.

By: Xavier

Xavier — Mon, 29 Jun 2009 09:13:24 +0000

I got a similar error message trying to drop a unique key on 3 columns, 2 of which had relationships to other tables. In phpmyadmin I modified the unique key into an index and chose “ignore” for 2 of the columns (I could do that because it was meaningful to have an index on the remaining key). The update ran without any error. But I agree MySQL error message sucks!

By: Barry

Barry — Wed, 03 Jun 2009 16:23:48 +0000

Thanks a lot, I had a similar problem, Trenton’s specific solution solved my problem!

By: Nitesh

Nitesh — Mon, 19 Jan 2009 07:38:17 +0000

Way pointed by Trenton is the correct approach for dropping a foreign key constraint.

First you need to drop the foreign key constraint using its internal name and then using the visible name – yes that is quite confusing and I wonder why MySQL never worked on it to make it simple.

For more details, one can visit the link pointed by Trenton in same comment (http://www.xaprb.com/blog/2006/08/22/mysqls-error-1025-explained/#comment-13404).

Th for such detailed discussion.