increment_string($str[, $separator = '_'[, $first = 1]])

rsegment_array()

list_fields()

db_select([$database = ''])

set_mode($mode)

class CI_DB_query_builder reset_query()

clear_vars()

get_compiled_delete([$table = ''[, $reset = TRUE]])

select_avg([$select = ''[, $alias = '']])

get_vars()