Use ALTER TABLE item ALTER COLUMN title TYPE character varying(2000)
COLLATE pg_catalog."zh_TW.euctw";
but, SQL state: 42704 "UTF8" "pg_catalog.zh_TW.euctw" not found
2011/9/19 Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
> "yulin liu" <e9320(dot)tw(at)gmail(dot)com> writes:
> > can't change Column COLLATE pg_catalog."default" to
> pg_catalog."zh_TW.euctw"
>
> Use ALTER TABLE ... ALTER COLUMN ... TYPE ... COLLATE ...
>
> regards, tom lane
>