Re: Command Triggers, patch v11

Robert Haas <robertmhaas@gmail.com>

From: Robert Haas <robertmhaas@gmail.com>

To: Tom Lane <tgl@sss.pgh.pa.us>

Cc: Thom Brown <thom@linux.com>, Dimitri Fontaine <dimitri@2ndquadrant.fr>, pgsql-hackers@postgresql.org, Andres Freund <andres@anarazel.de>

Date: 2012-03-09T15:29:31Z

Lists: pgsql-hackers

Commits

Same data as JSON: GET /api/v1/messages/:b64id/commits the thread's linked commits as JSON, with link sources. API reference →

Fix SPGiST vacuum algorithm to handle concurrent tuple motion properly.
- b4af1c25bbc6 9.2.0 cited
Remove useless const qualifier
- 66f0cf7da8ee 9.2.0 cited
Make executor's SELECT INTO code save and restore original tuple receiver.
- dfd26f9c5f37 9.2.0 cited

On Fri, Mar 9, 2012 at 10:05 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> On Fri, Mar 9, 2012 at 9:22 AM, Thom Brown <thom@linux.com> wrote:
>>> Sorry, I meant any command trigger.  It's because none of the commands
>>> can be run on a standby, so the triggers don't seem appropriate.
>
>> I'm not convinced.  Right now, it's fairly useless - all the triggers
>> could possibly do is throw an error, and an error is going to get
>> thrown anyway, so it's only a question of which error message the user
>> will see.  But we discussed before the idea of adding a capability for
>> BEFORE triggers to request that the actual execution of the command
>> get skipped, and then it's possible to imagine this being useful.
>
> Um, surely the "you can't do that in a read-only session" error is going
> to get thrown long before the command trigger could be called?

Hmmm.... yeah.

-- 
Robert Haas
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