Re: Adding auto-increment / sequence

am  Mon, dem 21.05.2007, um 18:29:46 -0700 mailte camb folgendes:
> Hey all,
> Is there any way to add some kind of sequence of auto-incrementing
> column to the result set returned by a  SELECT?

Yes.

You can use an sequence similar this:

test=# select * from foo;
 col1 | col2 | col3
------+------+------
    1 |    2 |
    2 |      |
(2 rows)

test=*# create sequence foo_seq;
CREATE SEQUENCE
test=*# select nextval('foo_seq'), * from foo;
 nextval | col1 | col2 | col3
---------+------+------+------
       1 |    1 |    2 |
       2 |    2 |      |
(2 rows)


Don't forget to reset this sequence, the next select nextval() starts
with the current value and returns 3.


Other way: write an set-returning function and count the rows there.



Andreas
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Andreas Kretschmer
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