Insert into a table with only a SERIAL
I am pretty much self taught using SQL, and I suspect that my problem
here is trying to do something silly. I have since changed my tables
and avoided the problem, but I am curious as to why this happens, and
it's remotely possible I have even found a bug or two.
I created a table with only a sequence:
CREATE TABLE aaa (
id SERIAL,
);
I can't insert into aaa unless I pass a value; these don't work:
insert into aaa;
insert into aaa values ();
insert into aaa () values ();
But this does:
insert into aaa values (1);
except that the value inserted is not known to the sequence.
(** This seems a bug to me **)
This also works:
insert into aaa values (nextval('aaa_id_seq'));
but sort of defeats the purpose of using a type SERIAL rather than
hand rolling my own sequence.
--
... _._. ._ ._. . _._. ._. ___ .__ ._. . .__. ._ .. ._.
Felix Finch: scarecrow repairman & rocket surgeon / felix@crowfix.com
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I've found a solution to Fermat's Last Theorem but I see I've run out of room o
<felix@crowfix.com> writes:
I can't insert into aaa unless I pass a value; these don't work:
insert into aaa;
insert into aaa values ();
insert into aaa () values ();
"INSERT INTO aaa DEFAULT VALUES" is the SQL-approved verbiage.
(Hey, I didn't design this language ;-))
regards, tom lane
On Sun, 25 Jun 2000, Tom Lane wrote:
"INSERT INTO aaa DEFAULT VALUES" is the SQL-approved verbiage.
Wow, the same question in two days. Perhaps FAQ worthy?
And yes, if I had only caught up on my reading, I wouldn't have had to
have posted the second one. Argh.
R.
At 06:56 PM 27-06-2000 -0700, Richard Harvey Chapman wrote:
On Sun, 25 Jun 2000, Tom Lane wrote:
"INSERT INTO aaa DEFAULT VALUES" is the SQL-approved verbiage.
Wow, the same question in two days. Perhaps FAQ worthy?
Actually it seems to happen quite often - all of a sudden people ask the
same thing around the same time.
Maybe part of that World Mind/Consciousness thing :).
But it could also be something like the 3 buses in a row phenomena.
For example: newbies start with a standard distribution of questions.
Some of them are answered by people on the list, some not.
Thus a bunch of newbies will reach a certain stage in their
understanding/knowledge and experience. These bunch will tend encounter
similar problems, and thus ask similar questions, some of which are answered.
This hypothesis predicts that "same question in X days" will happen more
often than in a random/unbiased case.
Cheerio,
Link.