[PATCH] PostgreSQL CAST Problem on Defaultvalues

Hi

i have a problem with PostgreSQL. PostgreSQL can cast default values and AR read the default string with cast into schema.rb.

sample:

CREATE TABLE soeintest
( test character varying NOT NULL DEFAULT '456' );
on db:

CREATE TABLE soeintest
( test character varying NOT NULL DEFAULT '456'::character varying );
in schema:

t.string "test", :default => "'456'::character varying", :null => false

I have fix this Problem by change the SQL that read the data.