Re: sql_drop Event Trigger - Mailing list pgsql-hackers

From Dimitri Fontaine
Subject Re: sql_drop Event Trigger
Date
Msg-id m2a9raaolq.fsf@2ndQuadrant.fr
Whole thread Raw
In response to Re: sql_drop Event Trigger  (Robert Haas <robertmhaas@gmail.com>)
Responses Re: sql_drop Event Trigger
List pgsql-hackers
Robert Haas <robertmhaas@gmail.com> writes:
>> Robert, you specifically opposed to "sql_drop" and I just removed it
>> from the patch. What do you think now? Also, should that be a follow-up
>> patch to the current one for your reviewing purposes?
>
> Well, if it has a different firing point than ddl_command_end, then
> there could well be some point to having it after all.  But I'm far
> from convinced that the proposed firing point can be made safe without
> a major refactoring.  I think this is the sort of things where "design
> before code" ought to be the cardinal rule.

Ok se we are in agreement here. I think we should see about getting the
dropped_objects.3.patch.gz in (pending review), then continue with that
patch series:
 - publishing some object specific information in TG_*
 - deciding on a design for generated commands, maybe commit it if it   happens to look a lot like what I already have
donethose past years
 
 - adding a function pg_get_normalized_command_string(parsetree) that   takes as input internal (Node *) and provide a
textas output
 

Note: all that code exists already, in a more or less complete form, and
has been around for between 1 and 2 years. I'm *not* trying to push *new*
things in the current commit fest, only to make it so that the current
patch series deliver a minimum set of features that is usable by itself.

Have a look at my slides from FOSDEM where I tried to share my vision
here. I don't have a use case for Event Triggers without them publishing
object or command specific information, as is currently the case in our
tree:
 http://tapoueh.org/images/confs/Fosdem2013_Event_Triggers.pdf

Regards,
-- 
Dimitri Fontaine
http://2ndQuadrant.fr     PostgreSQL : Expertise, Formation et Support



pgsql-hackers by date:

Previous
From: Tom Lane
Date:
Subject: Re: performance regression in 9.2 CTE with SRF function
Next
From: Tom Lane
Date:
Subject: Re: Fwd: Successful post to pgsql-hackers