Re: convert column of integer type to time type?

Michael,
Thank you for you help.
This solution worked.

On 27/06/2007 12:22, Michael Glaesemann wrote the following:
>
> On Jun 27, 2007, at 10:36 , Carol Cheung wrote:
>
>> My question is: Is it possible to alter the 'some_int' column directly
>> without having to create a temporary 'some_time' holding column?
>
> Are you trying to alter the table to replace your some_int column with a
> some_time column? I believe you can do this in two steps.
>
> SELECT *
> FROM some_data;
> some_int
> ----------
> 12
> 345
> 1622
> 1
> (4 rows)
>
> ALTER TABLE some_data
> ALTER some_int TYPE TIME WITHOUT TIME ZONE
> USING CAST(to_char(some_int, 'FM99909:99') AS TIME WITHOUT TIME
> ZONE);
>
> ALTER TABLE some_data
> RENAME some_int TO some_time;
>
> SELECT *
> FROM some_data;
> some_time
> -----------
> 00:12:00
> 03:45:00
> 16:22:00
> 00:01:00
> (4 rows)
>
> Hope this helps.
>
> Michael Glaesemann
> grzm seespotcode net
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Have you searched our list archives?
>
> http://archives.postgresql.org