How to alter the size of a column

Cheng Kai <chengk@isse.kuis.kyoto-u.ac.jp>

From: "Cheng Kai" <chengk@isse.kuis.kyoto-u.ac.jp>
To: <pgsql-general@postgresql.org>
Date: 2000-08-01T03:41:32Z
Lists: pgsql-general
Hi,

     I want to alter the size of a column, say from char(40) to char(80),
but it seem that
the  ALTER does not support such operation, nor does it support column
removing.

     How can I do for this ?


     Thanks