2006/5/18, Alvaro Herrera <[EMAIL PROTECTED]>:
Guillaume LELARGE wrote:
> Emi Lu a écrit :
> > I am trying to insert one column to a specific position in a table.
> >
> > In mysql, I can do:
> > . create table test(id varchar(3), name varchar(12));
> > . alter table test add column givename varchar(12) after id;
> >
> >
> > I am looking for similar things in postgresql to add a new column to the
> > correct position in a table.
>
> There's no similar thing in PostgreSQL. You have to duplicate the table
> to do it.
... which is the same thing MySQL does, only you must do it explicitely.
Do you mean that, using "alter table test add column" with the "after"
option, MySQL creates a new table, populates it with the old table
data and finally drops the old table ? I mean, there's the same
performance problem with big tables ?
--
Guillaume.
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