Обсуждение: Can't query the sequence table of a serial primary key.

"Fred Parkinson" <FredP@abag.ca.gov> wrote:

> When I do \d I see the table and the sequencer under 'List of
> relations'.  But when I run select * from mytable_id_seq;
> postgresql responds with: relation 'mytable_id_seq' does not
> exist.

It works for me.  Can you provide a small self-contained test case
which demonstrates the problem?

Hopefully you are aware of these functions, which might be easier:

http://www.postgresql.org/docs/8.4/interactive/functions-sequence.html

-Kevin

"Fred Parkinson" <FredP@abag.ca.gov> writes:
> We have moved some databases from 7.x to 8.4
> Previously I could query the sequencing table of a 'serial primary key' by simply running
> select * from mytable_id_seq;
> where mytable has id as a serial primary key and mytable_id_seq is the postgresql relation which manages the key.

That naming relationship isn't guaranteed, and AFAIR it wasn't
guaranteed in 7.4 either; in case of name collision you'd get something
like mytable_id_seq1 instead.

> When I do \d I see the table and the sequencer under 'List of relations'.
> But when I run select * from mytable_id_seq; postgresql responds with:
> relation 'mytable_id_seq' does not exist.

Maybe the sequence is in a schema that's not in your search_path.

            regards, tom lane