| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
| Cc: | Michael Paquier <michael(at)paquier(dot)xyz>, Fujii Masao <masao(dot)fujii(at)oss(dot)nttdata(dot)com>, Masahiko Sawada <masahiko(dot)sawada(at)2ndquadrant(dot)com>, Kyotaro Horiguchi <horikyota(dot)ntt(at)gmail(dot)com>, sitnikov(dot)vladimir(at)gmail(dot)com, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: SIGSEGV from START_REPLICATION 0/XXXXXXX in XLogSendPhysical () at walsender.c:2762 |
| Date: | 2020-06-04 22:51:08 |
| Message-ID: | 20200604225108.optmmc3ndiggej32@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2020-06-04 16:44:53 -0400, Alvaro Herrera wrote:
> A logical replication connection cannot run SQL anyway, can it?
You can:
andres(at)awork3:~/src/postgresql$ psql 'replication=database'
postgres[52656][1]=# IDENTIFY_SYSTEM;
┌─────────────────────┬──────────┬────────────┬──────────┐
│ systemid │ timeline │ xlogpos │ dbname │
├─────────────────────┼──────────┼────────────┼──────────┤
│ 6821634567571961151 │ 1 │ 1/D256EC40 │ postgres │
└─────────────────────┴──────────┴────────────┴──────────┘
(1 row)
postgres[52656][1]=# SELECT 1;
┌──────────┐
│ ?column? │
├──────────┤
│ 1 │
└──────────┘
(1 row)
I am very much not in love with the way that was implemented, but it's
there, and it's used as far as I know (cf tablesync.c).
Greetings,
Andres Freund
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