Re: Why does the sequence skip a number with generate_series?

On Tue, 2 Oct 2007, Jeff Frost wrote:

> I expected these numbers to be in sync, but was suprised to see that the
> sequence skips a values after every generate series.
>
> CREATE TABLE jefftest ( id serial, num int );
> INSERT INTO jefftest (num) values (generate_series(1,10));
> INSERT INTO jefftest (num) values (generate_series(11,20));
> INSERT INTO jefftest (num) values (generate_series(21,30));

It seems to do what you'd expect if you doINSERT INTO jefftest(num) select a from generate_series(1,10) as
foo(a);INSERTINTO jefftest(num) select a from generate_series(11,20) as foo(a);INSERT INTO jefftest(num) select a from
generate_series(21,30)as foo(a);
 

I tried a function that raises a notice and called it asselect f1(1), generate_series(1,10);
and got 11 notices so it looks like there's some kind of phantom involved.