Jaime Casanova wrote:
> On Thu, Mar 5, 2009 at 10:47 AM, Matteo Beccati wrote:
>
>> Guillaume Smet ha scritto:
>>
>>> On Wed, Mar 4, 2009 at 11:50 AM, Peter Eisentraut wrote:
>>>
The question is how you want to implement this in a data type independent
fashion. You can't
On Thu, Mar 5, 2009 at 3:27 PM, Xuân Baldauf
wrote:
>
>
> Well, while this behaviour is well-known for PostgreSQL, this is actually an
> abuse of syntax. If there are legitimate requirements for rewriting a table,
> then there should be explicit syntax for such a feature, like "ALTER TABLE
> ... R
On Thu, Mar 5, 2009 at 2:46 PM, Kevin Grittner
wrote:
>
>> now, back to the problem... is not easier to define a column as TEXT
>> and to put a check to constraint the length? if you wanna change the
>> constraint that will be almost free
>
> Thanks for the interesting suggestion. I'm not sure I'
>>> Jaime Casanova wrote:
> the table will be scanned but not rewritten
That can still be a very long time on some tables.
And there would still be the issue of dodging all the brickbats thrown
at me by developers whose tools use the system tables to limit the
number of characters a user is a
>>> Jaime Casanova wrote:
> ALTER TABLE ... TYPE does cause a table rewrite even if new_type =
> old_type, and that is actually useful...
> for example when you add a fillfactor to an existing table that
> fillfactor will not affect the existing data until you rewrite the
> table and a convenien
On Thu, Mar 5, 2009 at 10:47 AM, Matteo Beccati wrote:
> Guillaume Smet ha scritto:
>> On Wed, Mar 4, 2009 at 11:50 AM, Peter Eisentraut wrote:
>>> The question is how you want to implement this in a data type independent
>>> fashion. You can't assume that increasing the typmod is a noop for all
Guillaume Smet ha scritto:
> On Wed, Mar 4, 2009 at 11:50 AM, Peter Eisentraut wrote:
>> The question is how you want to implement this in a data type independent
>> fashion. You can't assume that increasing the typmod is a noop for all data
>> types.
>
> Sure. See my previous answer on -hackers
