Re: sequence value of the record just inserted.

Ben Kim <bkim@coe.tamu.edu> wrote:
>
>
> Dear admins,
>
> I have a table whose primary key is a record_id with serial type.
>
> I would like to know, when I insert a new row, what was the value of the
> record_id that I just inserted. Since this is a multi user application, I
> cannot simply select max of the record_id or currval of the sequence.

You certainly can use currval();

In session #1 I do...

jseymour=> create table foo3 (bar serial, baz int);
jseymour=> insert into foo3 (baz) values (1);

This will put "1" in for column "bar".

In session #2 I do...

jseymour=> insert into foo3 (baz) values (1);

This will put "2" in for column "bar".

Now back to session #1...

jseymour=> select currval('foo3_bar_seq');
 currval
---------
       1
(1 row)

And session #2...

jseymour=> select currval('foo3_bar_seq');
 currval
---------
       2
(1 row)

HTH,
Jim