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

CodeIgniter’s database abstraction allows you to use transactions with databases that support transaction-safe table types. In MySQL, you’ll need to be running InnoDB or BDB

affected_rows()

trans_strict([$mode = TRUE])

num_fields()

db_pconnect()

from($from)

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

modify_column($table, $field)

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