If you start psql with the -E flag it will output the
SQL queries it uses to do the nifty \ds command (and
all of the other \ commands). This is a very handy
tool.
Here's what I get on my test system:
processdata=# \ds
********* QUERY *********
SELECT c.relname as "Name",
(CASE WHEN relkind = 'S' THEN 'sequence'::text ELSE
'index'::text END) as "Type",
u.usename as "Owner"
FROM pg_class c, pg_user u
WHERE c.relowner = u.usesysid AND relkind in ('S')
AND c.relname !~ '^pg_'
UNION
SELECT c.relname as "Name",
(CASE WHEN relkind = 'S' THEN 'sequence'::text ELSE
'index'::text END) as "Type",
NULL as "Owner"
FROM pg_class c
WHERE not exists (select 1 from pg_user where usesysid
= c.relowner) AND relkind in ('S')
AND c.relname !~ '^pg_'
ORDER BY "Name"
*************************
List of relations
Name | Type | Owner
---------------------------+----------+----------
batterbatches_batchid_seq | sequence | earlj
board_event_seq | sequence | postgres
field_event_seq | sequence | postgres
peeler_inst_seq | sequence | postgres
prod_journal_id_seq | sequence | postgres
raw_inst_seq | sequence | postgres
setting_inst_seq | sequence | postgres
setting_mods_seq | sequence | postgres
setting_specs_seq | sequence | postgres
train_event_seq | sequence | postgres
tscales_seq | sequence | postgres
(11 rows)
Take care,
Jason
--- Arcady Genkin <a.genkin@utoronto.ca> wrote:
> Where does Postgres store information about the
> sequences? I tried
> looking in the tables produced by "\dS", but could
> find no references
> to the sequences. :(
>
> What I want is an SQL equivallent of "\ds" command,
> which will return
> a list of all sequences in the current database. I
> need this for a
> periodically run script so that I could keep an eye
> on all sequences
> in the database.
>
> Many thanks,
> --
> Arcady Genkin
>
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