where($key[, $value = NULL[, $escape = NULL]])

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

class CI_DB_forge add_column($table[, $field = array()[, $_after = NULL]])

or_not_like($field[, $match = ''[, $side = 'both'[, $escape = NULL]]])

result_object()

first_row([$type = 'object'])

affected_rows()

from($from)

query($sql[, $binds = FALSE[, $return_object = NULL]])

escape_identifiers($item)