Re: Combining Aggregates

On Wed, Jan 20, 2016 at 7:38 AM, David Rowley
<david.rowley@2ndquadrant.com> wrote:
>> To my mind, priority #1 ought to be putting this fine new
>> functionality to some use.  Expanding it to every aggregate we've got
>> seems like a distinctly second priority.  That's not to say that it's
>> absolutely gotta go down that way, but those would be my priorities.
>
> Agreed. So I've attached a version of the patch which does not have any of
> the serialise/deserialise stuff in it.
>
> I've also attached a test patch which modifies the grouping planner to add a
> Partial Aggregate node, and a final aggregate node when it's possible.
> Running the regression tests with this patch only shows up variances in the
> EXPLAIN outputs, which is of course expected.

That seems great as a test, but what's the first patch that can put
this to real and permanent use?

-- 
Robert Haas
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