Horton

Re: delta relations in AFTER triggers

Craig Ringer <craig@2ndquadrant.com>

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From: Craig Ringer <craig@2ndquadrant.com>
To: David Fetter <david@fetter.org>
Cc: Kevin Grittner <kgrittn@gmail.com>, Thomas Munro <thomas.munro@enterprisedb.com>, Haribabu Kommi <kommi.haribabu@gmail.com>, Jim Nasby <Jim.Nasby@bluetreble.com>, Michael Paquier <michael.paquier@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Kevin Grittner <kgrittn@ymail.com>, Tom Lane <tgl@sss.pgh.pa.us>, Amit Khandekar <amit.khandekar@enterprisedb.com>, Alvaro Herrera <alvherre@2ndquadrant.com>, Pg Hackers <pgsql-hackers@postgresql.org>
Date: 2017-04-03T01:34:26Z
Lists: pgsql-hackers 
On 1 April 2017 at 02:29, David Fetter <david@fetter.org> wrote:
> On Fri, Mar 31, 2017 at 12:20:51PM -0500, Kevin Grittner wrote:
>> On Thu, Mar 30, 2017 at 11:51 AM, Kevin Grittner <kgrittn@gmail.com> wrote:
>>
>> > New version attached.  It needs some of these problem cases added
>> > to the testing, and a mention in the docs that only C and plpgsql
>> > triggers can use the feature so far.  I'll add those tomorrow.
>>
>> Done and attached.
>>
>> Now the question is, should it be pushed?
>
> Yes.  Among other things, that'll get it buildfarm tested and give
> people interested in other PLs better visibility.
>
> That, and I suspect that people will start using this infrastructure
> for some very cool projects.

Yeah, I was excited to see this committed. It practically begs to be
used for plpgsql TABLE valued variables backed by tuplestores.

-- 
 Craig Ringer                   http://www.2ndQuadrant.com/
 PostgreSQL Development, 24x7 Support, Training & Services

Commits

  1. Don't permit transition tables with TRUNCATE triggers.

  2. Pass EXEC_FLAG_REWIND when initializing a tuplestore scan.

  3. Faster expression evaluation and targetlist projection.

  4. Remove obsoleted code relating to targetlist SRF evaluation.

  5. Implement syntax for transition tables in AFTER triggers.