Re: Minimal logical decoding on standbys

On Tue, 25 Jun 2019 at 19:14, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> On Fri, Jun 21, 2019 at 11:50 AM Amit Khandekar <amitdkhan(dot)pg(at)gmail(dot)com> wrote:
> > > This definitely needs to be expanded, and follow the message style
> > > guideline.
> >
> > This message , with the v8 patch, looks like this :
> > ereport(LOG,
> > (errmsg("Dropping conflicting slot %s", NameStr(slotname)),
> > errdetail("%s", reason)));
> > where reason is a char string.
>
> That does not follow the message style guideline.
>
> https://www.postgresql.org/docs/12/error-style-guide.html
>
> From the grammar and punctuation section:
>
> "Primary error messages: Do not capitalize the first letter. Do not
> end a message with a period. Do not even think about ending a message
> with an exclamation point.
>
> Detail and hint messages: Use complete sentences, and end each with a
> period. Capitalize the first word of sentences. Put two spaces after
> the period if another sentence follows (for English text; might be
> inappropriate in other languages)."

Thanks. In the updated patch, changed the message style. Now it looks
like this :

primary message : dropped conflicting slot slot_name
error detail : Slot conflicted with xid horizon which was being
increased to 9012 (slot xmin: 1234, slot catalog_xmin: 5678).

--------------------

Also, in the updated patch (v11), I have added some scenarios that
verify that slot is dropped when either master wal_level is
insufficient, or when slot is conflicting. Also organized the test
file a bit.

--
Thanks,
-Amit Khandekar
EnterpriseDB Corporation
The Postgres Database Company