free_result()

result_array()

flush_cache()

create_table($table[, $if_not_exists = FALSE[, array $attributes = array()]])

rename_table($table_name, $new_table_name)

custom_result_object($class_name)

escape_like_str($str)

class CI_DB_result result([$type = 'object'])

replace([$table = ''[, $set = NULL]])

backup([$params = array()])