Allow identity based sequences to be found and reset

[kbarber]

Fixes: #777

I put this up as a fix and a regression test for #777. With some changes to the query I've managed to get it discovering identity + normal sequences:

create sequence kbgood_id_seq;
create table kbgood (id integer primary key default nextval('kbgood_id_seq'));

create table kbbad (id integer generated always as identity);
-- implies kbbad_id_seq is created

12:46:12.370 624 INFO   sequences.c:78            Fetching information for 2 sequences

12:49:30.865 650 SQL    pgsql.c:1572              [TARGET 308053] 'public.kbbad_id_seq', '1', 'false'
12:49:32.412 650 SQL    pgsql.c:1559              [TARGET 308053] select pg_catalog.setval($1::regclass, $2, $3);
12:49:32.412 650 SQL    pgsql.c:1572              [TARGET 308053] 'public.kbgood_id_seq', '1', 'false'
12:49:32.926 650 SQL    pgsql.c:1559              [TARGET 308053] select pg_catalog.setval($1::regclass, $2, $3);

[dimitri]

Looks good. I'm not sure how to reason about the SQL changes by themselves, so I must admit I'm relying on the test suite here. Speaking of which, see comments.

[kbarber]

@dimitri passing again

[dimitri]

Thanks @kbarber !

[kbarber]

I'm not sure how to reason about the SQL changes by themselves, so I must admit I'm relying on the test suite here.

@dimitri goes without saying I guess, but if you get a regression and need me let me know. Thanks for your help on this one, I prefer the unit test area, I'll be sure to populate it some more :-).