Re: Sequences

Thanks so much. This was very helpful! Thanks.

Lance

On 12/4/18, 1:18 PM, "Alex Balashov" <abalashov(at)evaristesys(dot)com> wrote:

Constructing dynamic SQL is always a bit tricky. Try define this
function:

---
CREATE OR REPLACE FUNCTION seqs_last_val()
RETURNS SETOF record
AS $$
DECLARE
_seqname varchar;
_r record;
BEGIN
SELECT INTO _r null::varchar AS seqname, -1::integer AS lastval;

FOR _seqname IN
SELECT sequence_name
FROM information_schema.sequences
WHERE sequence_schema = 'public'
LOOP
_r.seqname = _seqname;
EXECUTE format('SELECT last_value FROM %s', quote_ident(_seqname)) INTO _r.lastval;
RETURN NEXT _r;
END LOOP;

RETURN;
END
$$ LANGUAGE 'plpgsql';
---

Then run:

SELECT * FROM seqs_last_val() AS (seqname varchar, last_value integer);

-- Alex

On Tue, Dec 04, 2018 at 07:03:11PM +0000, Campbell, Lance wrote:
> PostgreSQL 10.x
>
> What query will give the name of all sequences in a database and the current or next value for each sequence?
>
> This will give me everything except for the next value in the sequence.
>
> SELECT * FROM information_schema.sequences;
>
> Thanks,
>
> Lance

--
Alex Balashov | Principal | Evariste Systems LLC

Tel: +1-706-510-6800 / +1-800-250-5920 (toll-free)
Web: http://www.evaristesys.com/, http://www.csrpswitch.com/