insert([$table = ''[, $set = NULL[, $escape = NULL]]])

result_array()

free_result()

set($key[, $value = ''[, $escape = NULL]])

drop_column($table, $column_name)

class CI_DB_utility backup([$params = array()])

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

custom_result_object($class_name)

previous_row([$type = 'object'])

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