Re: enable_joinremoval

Robert Haas <robertmhaas@gmail.com> writes:
> On Mon, Mar 29, 2010 at 4:33 AM, Simon Riggs <simon@2ndquadrant.com> wrote:
>> So I think we need a parameter for join removal also.

> I had this in my original patch but Tom wanted it taken out.

And I still don't want it.  We are NOT going in the direction of adding
an enable_ knob for every single planner activity --- do you have the
faintest idea how many there would be?  We have such knobs for a small
number of cases where it's arguable that the action might be the wrong
thing for a particular query.  Join removal, if applicable, can't
possibly be the wrong choice; it's better than every other join strategy.
        regards, tom lane