Maybe this works:
ALTER TABLE product ALTER status TYPE int USING CASE WHEN status THEN 1 ELSE 0 END;
If it doesn't, can you post the exact SQL you use and the exact error message?
On Mon, Aug 30, 2010 at 5:27 PM, <wei725@xxxxxxxxx> wrote:
Unfortunately, the statement doesn't work. I get an error message about unable to convert boolean to integer.
I have a look at the case statement for the conversion, but don't understand how it works.
----- Original Message -----
From: "Arjen Nienhuis" <a.g.nienhuis@xxxxxxxxx>
To: wei725@xxxxxxxxx
Cc: pgsql-general@xxxxxxxxxxxxxx
Sent: Thursday, August 26, 2010 4:56:09 AM GMT -08:00 US/Canada Pacific
Subject: Re: How to convert a binary filed to an integer field?
On Wed, Aug 25, 2010 at 9:29 PM, < wei725@xxxxxxxxx > wrote:
I have an application in the product. Now, one status field needs to have three statuses instead of two. How to make a such change in PostgreSQL?
ALTER TABLE product ALTER status TYPE int USING status::integer;
