Re: [SQL] How to Convert Integer to Serial

ohhh,, sorry... It was wrong post..sorry again...

On Fri, Oct 29, 2010 at 10:30 AM, Shoaib Mir <shoaibmir(at)gmail(dot)com> wrote:

> On Fri, Oct 29, 2010 at 3:48 PM, venkat <ven(dot)tammineni(at)gmail(dot)com> wrote:
>
>> Dear All,
>>
>> I want to convert integer datatype to serial datatype.. is that
>> possible.Please let me know.
>>
>>
> I don't think ALTER TABLE will let you do that... so the best way to
> achieve the same is:
>
> - Create a sequence for the column (set the start of sequence according to
> the values you got already in the column)
> - Now set this sequence as the default value for that specific column which
> you need to ALTER like this:
>
> ALTER TABLE tablename ALTER COLUMN columnname
> SET DEFAULT nextval('newsequence'::regclass);
>
> --
> Shoaib Mir
> http://shoaibmir.wordpress.com/
>