Ok, I'm convinced this should work but it does not:
CREATE FUNCTION ConvertIntToOrderStateEnum(state integer) RETURNS
OrderStateEnum AS
$BODY$
SELECT CASE WHEN $1=0 then 'Preview'::OrderStateEnum
WHEN $1=1 then 'InQueue'::OrderStateEnum
WHEN $1=2 then 'Ordered'::OrderStateEnum
WHEN $1=3 then 'Error'::OrderStateEnum
WHEN $1=4 then 'Cancelled'::OrderStateEnum ELSE NULL END;
$BODY$
LANGUAGE 'sql' IMMUTABLE STRICT;
ALTER TABLE orders ALTER orderstate TYPE OrderStateEnum
USING ConvertIntToOrderStateEnum(OrderState);
I get the error:
ERROR: operator does not exist: orderstateenum >= integer
SQL state: 42883
Hint: No operator matches the given name and argument type(s). You
might need to add explicit type casts.
On Mon, Jun 7, 2010 at 12:11 AM, Mike Christensen <mike@xxxxxxxxxxxxx> wrote:
> Hi all -
>
> I have an existing table that looks like this:
>
> CREATE TABLE orders
> (
> --Bunch of stuff you don't care about
> orderstate integer NOT NULL,
> --Etc
> )
>
> with a bunch of data in it. I've now created this new data type:
>
> CREATE TYPE OrderStateEnum AS ENUM ('Preview', 'InQueue', 'Ordered',
> 'Error', 'Cancelled');
>
> I want to change the type of "orderstate" from integer to
> OrderStateEnum, and cast 0 to Preview, 1 to InQueue, 2 to Ordered,
> etc.
>
> I could create a new column, copy all the data over, then delete the
> old column, but I suspect there's some cool way to go about doing
> this. Thanks!
>
> Mike
>
> PS - This is totally shameless, but if you cook or your spouse does,
> I'd totally appreciate it if you could take a short survey to help us
> develop this website we're working on. We're hoping to get about a
> thousand responses so I have to plug it everywhere :) This URL is
> http://survey.kitchenpc.com/
>
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