why toast tables are not reindexed while clustering?

Hi,

My name is Tetsuo Sakata.
Now, I'm checking the PostgreSQL's CLUSTER command.
(I read PostgreSQL 8.1.2.)

I found that when clustering a table the toast table associated with
the table is not reindexed.
( reindex_relation() is called while the parameter toast_too is set false. For this parameter, reindex for the toast
tableis not done.)
 

I'll be pleased if someone tell me the reason why
when a table is clustered toast the table is not reindexed.

best regards,

Tetsuo.
-- 
sakata.tetsuo _at_ oss.ntt.co.jp
SAKATA, Tetsuo. Shinagawa Tokyo JAPAN.