Re: Command Triggers - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Command Triggers
Date
Msg-id 8901.1322763685@sss.pgh.pa.us
Whole thread Raw
In response to Re: Command Triggers  (Andres Freund <andres@anarazel.de>)
Responses Re: Command Triggers  (Andres Freund <andres@anarazel.de>)
Re: Command Triggers  (Andres Freund <andres@anarazel.de>)
List pgsql-hackers
Andres Freund <andres@anarazel.de> writes:
> On Tuesday, November 08, 2011 06:47:13 PM Dimitri Fontaine wrote:
>> exception to that rule would be SELECT INTO and CREATE TABLE AS SELECT,
>> and my proposal would be to add specific call sites to the functions
>> I've provided in the attached patch rather than try to contort them into
>> being a good citizen as a utility command.

> I would very much prefer to make them utility commands and rip out the 
> executor support for that.
> Is there something making that especially hard that I overlooked? The 
> infrastructure for doing so seems to be there.

Well, I think the main problem is going to be shunting the query down
the right parsing track (SELECT versus utility-statement) early enough.
Making this work cleanly would be a bigger deal than I think you're
thinking.

But yeah, it would be nicer if the executor didn't have to worry about
this.  +1 if you're willing to take on the work.
        regards, tom lane


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