Re: ALTER Table

Shridhar Daithankar wrote:

> Gaetano Mendola wrote:
>
>> Shridhar Daithankar wrote:
>>
>>> Alex wrote:
>>>
>>>> is it possible to add a column to a table at a specific place ?
>>>> Reading the man pages i could not figure that out.
>>>
>>>
>>>
>>>
>>> Why do you want to add it at specific location? What does it achieve?
>>
>>
>>
>> I miss the same feature too, this is my reason:
>> is just to keep clean your schema, I have in my revision control system
>> all tables with fields grouped for tipology:
>>
>> CREATE TABLE a(
>>
>>   G1  as INTEGER,
>>   ...
>>   Gn  as INTEGER,
>>   H1  as INTEGER,
>>   ...
>>   Hm  as INTEGER
>> );
>>
>> when I add let me say Gn+1 in my RCS I have:
>>
>> CREATE TABLE a(
>>
>>   G1   as INTEGER,
>>   ...
>>   Gn   as INTEGER,
>>   Gn+1 as INTEGER,
>>   H1   as INTEGER,
>>   ...
>>   Hm   as INTEGER
>> );
>>
>> and will be nice to have in my fourther dumps
>> the same structure, just to do a DIFF betwen two schemas
>> without become crazy!
>
>
> Well, if you diff two schema dumps, you will find one line added to
> correct scope i.e. {} block because it belongs to same table. And anyway
> there is big difference between schema diffs and database diffs. Sure
> you can not produce an SQL script which would bring two databases to
> same state.
>
> Only thing that can be done is to manually reordering the schema since
> it gives you pretty localised view of changes due to repository.
>
> Also check http://www.varlena.com/varlena/GeneralBits/30.html. The last
> bit summerises another discussion on this.

Yes but the missing feature is there.


Regards
Gaetano Mendola