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From: jian he <jian.universality@gmail.com>
Date: Wed, 29 Nov 2023 09:37:55 +0800
Message-ID: <CACJufxGd4_qSqU3-j9TFOS7JD0Jx+fSFNdVBnEeprP35ppFscQ@mail.gmail.com>
Subject: Re: [PATCH] ltree hash functions
To: Tommy Pavlicek <tommypav122@gmail.com>
Cc: daniel@yesql.se, Tomas Vondra <tomas.vondra@enterprisedb.com>, 
	Tom Lane <tgl@sss.pgh.pa.us>, pgsql-hackers@lists.postgresql.org
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On Wed, Nov 29, 2023 at 6:09=E2=80=AFAM Tommy Pavlicek <tommypav122@gmail.c=
om> wrote:
>
> On Thu, Jul 6, 2023 at 2:18=E2=80=AFAM Daniel Gustafsson <daniel@yesql.se=
> wrote:
> >
> > > On 19 Jun 2023, at 11:18, Tommy Pavlicek <tommypav122@gmail.com> wrot=
e:
> >
> > > Tommy, are you interested in extending ALTER OPERATOR to allow this,
> > > which would also allow fixing the ltree operator?
> > >
> > > Yes, I can do that. I took a look over the code and email thread and =
it seems like it should be relatively straight forward. I'll put a patch to=
gether for that and then update this patch to alter the operator.
> >
> > Did you have a chance to look at this for an updated patch for this com=
mitfest?
>
> I finally had a chance to look at this and I've updated the patch to
> alter the =3D operator to enable hash joins.
>
> This is ready to be looked at now.
>
> Is there anything I need to do to move this forward?
>

you only change Makefile, you also need to change contrib/ltree/meson.build=
?

+drop index tstidx;
+create index tstidx on ltreetest using hash (t);
+set enable_seqscan=3Doff;
+
+SELECT * FROM ltreetest WHERE t =3D  '12.3' order by t asc;

Do you need to use EXPLAIN to demo the index usage?