Log Message:
-----------
Fix ALTER COLUMN TYPE bug: it sometimes tried to drop UNIQUE or PRIMARY KEY
constraints before FOREIGN KEY constraints that depended on them. Originally
reported by Neil Conway on 29-Jun-2005. Patch by Nakano Yoshihisa.
Modified Files:
--------------
pgsql/src/backend/commands:
tablecmds.c (r1.176 -> r1.177)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/commands/tablecmds.c.diff?r1=1.176&r2=1.177)