Re: Handle infinite recursion in logical replication setup

Amit Kapila <amit.kapila16@gmail.com>

From: Amit Kapila <amit.kapila16@gmail.com>
To: Peter Smith <smithpb2250@gmail.com>
Cc: vignesh C <vignesh21@gmail.com>, "shiy.fnst@fujitsu.com" <shiy.fnst@fujitsu.com>, Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>, "kuroda.hayato@fujitsu.com" <kuroda.hayato@fujitsu.com>, PostgreSQL Hackers <pgsql-hackers@lists.postgresql.org>
Date: 2022-07-04T03:52:58Z
Lists: pgsql-hackers
On Mon, Jul 4, 2022 at 3:59 AM Peter Smith <smithpb2250@gmail.com> wrote:
>
> On Mon, Jul 4, 2022 at 12:59 AM vignesh C <vignesh21@gmail.com> wrote:
> ...
> > > 2.
> > > /* ALTER SUBSCRIPTION <name> SET ( */
> > >   else if (HeadMatches("ALTER", "SUBSCRIPTION", MatchAny) &&
> > > TailMatches("SET", "("))
> > > - COMPLETE_WITH("binary", "slot_name", "streaming",
> > > "synchronous_commit", "disable_on_error");
> > > + COMPLETE_WITH("binary", "origin", "slot_name", "streaming",
> > > "synchronous_commit", "disable_on_error");
> > >   /* ALTER SUBSCRIPTION <name> SKIP ( */
> > >   else if (HeadMatches("ALTER", "SUBSCRIPTION", MatchAny) &&
> > > TailMatches("SKIP", "("))
> > >   COMPLETE_WITH("lsn");
> > > @@ -3152,7 +3152,7 @@ psql_completion(const char *text, int start, int end)
> > >   /* Complete "CREATE SUBSCRIPTION <name> ...  WITH ( <opt>" */
> > >   else if (HeadMatches("CREATE", "SUBSCRIPTION") && TailMatches("WITH", "("))
> > >   COMPLETE_WITH("binary", "connect", "copy_data", "create_slot",
> > > -   "enabled", "slot_name", "streaming",
> > > +   "enabled", "origin", "slot_name", "streaming",
> > >     "synchronous_commit", "two_phase", "disable_on_error");
> > >
> > > Why do you choose to add a new option in-between other parameters
> > > instead of at the end which we normally do? The one possible reason I
> > > can think of is that all the parameters at the end are boolean so you
> > > want to add this before those but then why before slot_name, and again
> > > I don't see such a rule being followed for other parameters.
> >
> > I was not sure if it should be maintained in alphabetical order,
> > anyway since the last option "disable_on_error" is at the end, I have
> > changed it to the end.
> >
>
> Although it seems it is not a hard rule, mostly the COMPLETE_WITH are
> coded using alphabetical order. Anyway, I think that was a clear
> intention here too since 13 of 14 parameters were already in
> alphabetical order; it is actually only that "disable_on_error"
> parameter that was misplaced; not the new "origin" parameter.
>

Agreed, but let's not change disable_on_error as part of this patch.

-- 
With Regards,
Amit Kapila.



Commits

  1. Improved CREATE SUBSCRIPTION message for clarity

  2. Fix the test case introduced by commit 8756930190.

  3. Raise a warning if there is a possibility of data from multiple origins.

  4. Add wait_for_subscription_sync for TAP tests.

  5. Bump catversion for commit d8cd0c6c95c0120168df93aae095df4e0682a08a.

  6. Allow users to skip logical replication of data having origin.

  7. Improve two comments related to a boolean DefElem's value

  8. doc: Fix man page whitespace issues