Question

I’m trying to do

ALTER table tbl_name Engine=MyISAM;

and I get

ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails

How can I perform above query without deleting table having foreign key?

Thank you in advance!

UPD have I understood correctly that only MyIsam supports fulltext search?

Answer 1

try

SET FOREIGN_KEY_CHECKS = 0;
ALTER table tbl_name Engine=MyISAM;
SET FOREIGN_KEY_CHECKS = 1;

The InnoDB storage engine supports checking of foreign key constraints. For storage engines other than InnoDB, MySQL Server parses the FOREIGN KEY syntax in CREATE TABLE statements, but does not use or store it.

Foreign Key Differences