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('relacion_inmobiliarias') ->addColumn('padre', 'integer', ['length' => 11, 'default' => null, 'null' => true, 'signed' => false]) ->addColumn('hijo', 'integer', ['length' => 11, 'default' => null, 'null' => true, 'signed' => false]) ->create(); $this->execute('SET unique_checks=1; SET foreign_key_checks=1;'); } }