custom_result_object($class_name)

free_result()

insert_batch($table[, $set = NULL[, $escape = NULL[, $batch_size = 100]]])

protect_identifiers($item[, $prefix_single = FALSE[, $protect_identifiers = NULL[, $field_exists = TRUE]]])

drop_column($table, $column_name)

create_table($table[, $if_not_exists = FALSE[, array $attributes = array()]])

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

flush_cache()

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

or_where_in([$key = NULL[, $values = NULL[, $escape = NULL]]])