Mysql drop foreign key error on rename 152

Refer MySQL documentation which says. KEY is normally a synonym for INDEX. So basically in table you have created indexes, not foreign keys. For Foreign Key info, Click here. ALTER TABLE ` table_ name` DROP FOREIGN KEY ` id_ name_ fk` ; ALTER TABLE ` table_ name` DROP. To bypass this in PHPMyAdmin or with MySQL, first remove the foreign key constraint before renaming the attribute. The root cause is file( s) # sql2- 3ea- 2c* in data directory and/ or table with such name in internal InnoDB dictionary. That would prevent any ALTER operation on USERS table. Search google for ' removing orphaned innodb. I hope it works, however, unfortunately I haven´ t been able to reproduce the error myself, so neither this solution. But are you sure they aren' t trying to drop the foreign key by column name? I tried with you query mysql> ALTER TABLE Price DROP FOREIGN KEY Id. It executes, but didn' t worked!

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    Mysql foreign error

    Update: Use below queries. mysql> ALTER TABLE Price MODIFY Id SMALLINT. mysql> ALTER TABLE ducts\ # sql2- 7ec- a3' ( errno: 152) mysql>. To avoid getting this error while trying to drop a foreign key, use the constraint name rather than the column name of the. DROP PRIMARY KEY;. \ database\ # sql- 454_ 3' to '. mysql> ALTER TABLE mytable DROP PRIMARY KEY, ADD PRIMARY KEY ( column1, column2, column3) ;. You have the wrong name of the foreign key. Ancient post, but FWIW I just discovered that the foreign key name is case sensitive. ~ ] $ perror 152 MySQL error code 152: Cannot delete a parent row. SHOW CREATE TABLE misc ;. You can' t drop the foreign key using the column name, run the above query to find out the correct name, something like misc_ ibfk_ 1. Heh, IT IS this name: alter table misc drop FOREIGN KEY.

    You usually get this error if your tables use the InnoDB engine. In that case you would have to drop the foreign key, and then do the alter table and drop the column. But the tricky part is that you can' t drop the foreign key using. eltas\ # sql' ( errno: 152) now, i try to remove the constraint by it' s constraint name: mysql> alter table test drop foreign key FKref_ ID; ERROR 1025 ( HY000) : Error on rename of '. \ eltas\ test' to '. \ eltas\ # sql' ( errno:.