removing tsearch2

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>
To: Andres Freund <andres@anarazel.de>
Cc: Stephen Frost <sfrost@snowman.net>, Tom Lane <tgl@sss.pgh.pa.us>, Josh Berkus <josh@berkus.org>, Magnus Hagander <magnus@hagander.net>, Michael Paquier <michael.paquier@gmail.com>, Daniel Verite <daniel@manitou-mail.org>, Peter Eisentraut <peter.eisentraut@2ndquadrant.com>, Fujii Masao <masao.fujii@gmail.com>, Vladimir Rusinov <vrusinov@google.com>, David Steele <david@pgmasters.net>, Jim Nasby <Jim.Nasby@bluetreble.com>, Cynthia Shang <cynthia.shang@crunchydata.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2017-02-10T11:28:05Z
Lists: pgsql-hackers
On Thu, Feb 9, 2017 at 7:37 PM, Andres Freund <andres@anarazel.de> wrote:
> On 2017-02-09 19:19:21 -0500, Stephen Frost wrote:
>> * Robert Haas (robertmhaas@gmail.com) wrote:
>> > On Thu, Feb 9, 2017 at 4:24 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>> > > Also, our experience with contrib/tsearch2 suggests that the extension
>> > > shouldn't be part of contrib, because we have zero track record of getting
>> > > rid of stuff in contrib, no matter how dead it is.
>> >
>> > Let's nuke tsearch2 to remove this adverse precedent, and then add the
>> > new thing.
>> >
>> > Anybody who still wants tsearch2 can go get it from an old version, or
>> > somebody can maintain a fork on github.
>>
>> Works for me.
>
> +1

OK, that's three votes in favor of removing tsearch2 (from core,
anyone who wants it can maintain a copy elsewhere).  Starting a new
thread to make sure we collect all the relevant votes, but I really,
really think it's past time for this to go away.  The last actual
change to tsearch2 which wasn't part of a wider cleanup was
3ca7eddbb7c4803729d385a0c9535d8a972ee03f in January 2009, so it's been
7 years since there's been any real work done on this -- and the
release where we brought tsearch into core is now EOL, plus three more
releases besides.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise PostgreSQL Company


Commits

  1. Remove contrib/tsearch2.

  2. Create stub functions to support pg_upgrade of old contrib/tsearch2.

  3. Add backwards-compatible declarations of some core GIN support functions.

  4. Fix bug with multiple evaluation of tsearch2 compatibility trigger, trigger