Re: logical decoding and replication of sequences

On Sat, Feb 12, 2022 at 6:04 AM Tomas Vondra
<tomas(dot)vondra(at)enterprisedb(dot)com> wrote:
>
> On 2/10/22 19:17, Tomas Vondra wrote:
> > I've polished & pushed the first part adding sequence decoding
> > infrastructure etc. Attached are the two remaining parts.
> >
> > I plan to wait a day or two and then push the test_decoding part. The
> > last part (for built-in replication) will need more work and maybe
> > rethinking the grammar etc.
> >
>
> I've pushed the second part, adding sequences to test_decoding.
>

The test_decoding is failing randomly in the last few days. I am not
completely sure but they might be related to this work. The two of
these appears to be due to the same reason:
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=skink&dt=2022-02-25%2018%3A50%3A09
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=locust&dt=2022-02-17%2015%3A17%3A07

TRAP: FailedAssertion("prev_first_lsn < cur_txn->first_lsn", File:
"reorderbuffer.c", Line: 1173, PID: 35013)
0 postgres 0x00593de0 ExceptionalCondition + 160\\0

Another:
https://buildfarm.postgresql.org/cgi-bin/show_log.pl?nm=mandrill&dt=2022-02-16%2006%3A21%3A48

--- /home/nm/farm/xlc32/HEAD/pgsql.build/contrib/test_decoding/expected/rewrite.out
2022-02-14 20:19:14.000000000 +0000
+++ /home/nm/farm/xlc32/HEAD/pgsql.build/contrib/test_decoding/results/rewrite.out
2022-02-16 07:42:18.000000000 +0000
@@ -126,6 +126,7 @@
table public.replication_example: INSERT: id[integer]:4
somedata[integer]:3 text[character varying]:null
testcolumn1[integer]:null
table public.replication_example: INSERT: id[integer]:5
somedata[integer]:4 text[character varying]:null
testcolumn1[integer]:2 testcolumn2[integer]:1
COMMIT
+ sequence public.replication_example_id_seq: transactional:0
last_value: 38 log_cnt: 0 is_called:1
BEGIN
table public.replication_example: INSERT: id[integer]:6
somedata[integer]:5 text[character varying]:null
testcolumn1[integer]:3 testcolumn2[integer]:null
COMMIT
@@ -133,7 +134,7 @@
table public.replication_example: INSERT: id[integer]:7
somedata[integer]:6 text[character varying]:null
testcolumn1[integer]:4 testcolumn2[integer]:null
table public.replication_example: INSERT: id[integer]:8
somedata[integer]:7 text[character varying]:null
testcolumn1[integer]:5 testcolumn2[integer]:null
testcolumn3[integer]:1
COMMIT
- (15 rows)
+ (16 rows)

--
With Regards,
Amit Kapila.