db->field_exists('station_country', 'station_profile')) { $this->dbforge->drop_column('station_profile', 'station_country'); } } public function down() { $fields = array( 'station_country VARCHAR(255) NULL DEFAULT NULL AFTER `station_dxcc`', ); if (!$this->db->field_exists('station_country', 'station_profile')) { $this->dbforge->add_column('station_profile', $fields); } $sql = 'UPDATE `station_profile` JOIN `dxcc_entities` ON `station_profile`.`station_dxcc` = `dxcc_entities`.`adif` SET `station_profile`.`station_country` = `dxcc_entities`.`name`;'; $this->db->query($sql); } }