> 
> This depends on what platform you use. Some databases fully support
> adding columns (e.g. MySQL), for some this can only be used under
> specific conditions, and for some, there is no way of adding the
> column except by re-creating the table as is done in the SQL that you
> posted.
> 
> Tom
> 

I am using Firebird 1.5, and this supports add column.
So much that I removed the unnecessary commands,  
only remaining:

> ALTER TABLE IPI
>     ADD CLASSFISCAL VARCHAR(12);
>
> ALTER TABLE IPI
>     ALTER CLASSFISCAL POSITION 4;

And that's ran ok, the modification was executed with success.

Douglas

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