cache_delete([$segment_one = ''[, $segment_two = '']])

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

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

dbprefix([$table = ''])

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

next_row([$type = 'object'])

db_pconnect()

group_by($by[, $escape = NULL])

modify_column($table, $field)

cache_on()