create_database($db_name)

offset($offset)

list_databases()

optimize_table($table_name)

db_connect($persistent = TRUE)

cache_set_path([$path = ''])

class CI_DB_driver initialize()

xml_from_result($query[, $params = array()])

order_by($orderby[, $direction = ''[, $escape = NULL]])

trans_start([$test_mode = FALSE])