execute('SET unique_checks=0; SET foreign_key_checks=0;'); $this->execute("ALTER DATABASE CHARACTER SET 'utf8mb4';"); $this->execute("ALTER DATABASE COLLATE='utf8mb4_general_ci';"); $this->table('backup') ->addColumn('date', 'datetime', ['default' => null, 'null' => true]) ->create(); $this->execute('SET unique_checks=1; SET foreign_key_checks=1;'); } }