Re: Modyifying a column's datatype

On Wed, 3 Sep 2003, Ron Johnson wrote:

> On Wed, 2003-09-03 at 14:56, Louise Cofield wrote:
> > Greetings �
> >
> > It looks to me as if there is no way to alter the datatype of a table
> > column, as in from timestamp to varchar.  Am I right?  (I will cry if
> > I�m right.) L.
> >
> > It appears that I must drop and then re-create the table structure,
> > with my new column datatype,  in order to keep the columns in the
> > current order � true?
>
> There are references to this all throughout the archives.
>
> begin;
> alter table foo add column bar varchar;
> update foo set bar = cast(sniffle as varchar);
> alter table foo drop column sniffle;
> alter table foo rename column bar to sniffle;
> commit;

Just to be clear, however, that won't keep the columns in the same order
(although in general, that shouldn't be relied on anyway).