Cannot Drop Index Needed In A Foreign Key Constraint

Cannot Drop Index Needed In A Foreign Key Constraint. To avoid this problem, remove the foreign key constraint before dropping the index (bug #70260). To drop the index you have to drop the foreign key first.

MySQL error number 1553 MySQL Cannot drop index needed in from www.programmersought.com

Mariadb [test]> set foreign_key_checks = 0; Such an index is created on the referencing table automatically if it does not exist. When there is only one index that can be used for the foreign key, it can't be dropped.

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Error and structure of table: Needed in a foreign key constraint #13.

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Saya perlu mengubah database saya yang ada untuk menambahkan kolom. Closed osleg opened this issue dec 27, 2013 · 9 comments closed cannot drop index 'user_id':

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Needed in a foreign key constraint #13. Imho you should drop foreign key before drop the column.

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Mariadb [test]> set foreign_key_checks = 0; Saya mencoba untuk menghapus indeks saat ini tetapi tetap mendapatkan kesalahanmysql cannot drop index needed in a foreign key constraint

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So, it's not possible to drop that index and keep the foreign key. Hi i cannot reproduce this with 7.4.6:

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Mariadb [test]> set foreign_key_checks = 0; Mysql 错误号1553 mysql cannot drop index needed in a foreign key constraint,外键也会创建索引 26398;

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Needed in a foreign key constraint #13. Mysql cannot drop index needed in a foreign key constraint [ beautify your computer :

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Needed in a foreign key constraint #13. Rebuild the index by disabling foreign key at the database level.

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An exception occurred while executing 'drop index idx_dce815b325c79a8c on movemembers': With foreign_key_checks=0, dropping an index required by a foreign key constraint places the table in an inconsistent state and causes the foreign key check that occurs at table load to fail.

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If not an index will be created. Error and structure of table:

Create Table Mytable_A ( Id Tinyint Not Null Auto_Increment Primary Key, Name Varchar (255) Not Null, Unique (Name) ) Engine=Innodb;

I'm trying to remove the current index but keep getting the error mysql cannot drop index needed in a foreign key constraint. Drop index query to drop the unique index. Drop index statement to drop the unique index and it is dropped successfully.

To Drop The Index You Have To Drop The Foreign Key First.

Means, solution in simple terms is: Mariadb [test]> set foreign_key_checks = 0; 1553 cannot drop index 'idx_dce815b325c79a8c':

Needed In A Foreign Key Constraint #13.

By default, it will have the same name as the constraint. Mysql 错误号1553 mysql cannot drop index needed in a foreign key constraint,外键也会创建索引 26398; So, it's not possible to drop that index and keep the foreign key.

Needed In A Foreign Key Constraint The Foreign Key For Questionid Is Linked From The Image_Question Table To The Questionid In The Question Table.

Needed in a foreign key constraint. To avoid this problem, remove the foreign key constraint before dropping the index (bug #70260). Needed in a foreign key constraint.

Mysql Cannot Drop Index Needed In A Foreign Key Constraint.

By default, it will have the same name as the constraint. `alter table image_question drop index fk_questionsession` problem is though that i am receiving this error: Create table mytable_a ( id tinyint not null auto_increment primary key, name varchar.