| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Stephen Frost <sfrost(at)snowman(dot)net>, Tomas Vondra <tomas(dot)vondra(at)2ndquadrant(dot)com>, Andres Freund <andres(at)anarazel(dot)de>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Parallel Aggregates for string_agg and array_agg |
| Date: | 2018-03-27 14:58:14 |
| Message-ID: | 13700.1522162694@sss.pgh.pa.us |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-hackers |
David Rowley <david(dot)rowley(at)2ndquadrant(dot)com> writes:
> On 27 March 2018 at 13:26, Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> wrote:
>> synchronized_seqscans is another piece of precedent in the area, FWIW.
> This is true. I guess the order of aggregation could be made more
> certain if we remove the cost based optimiser completely, and just
> rely on a syntax based optimiser.
None of this is responding to my point. I think the number of people
who actually don't care about aggregation order for these aggregates
is negligible, and none of you have argued against that; you've instead
selected straw men to attack.
regards, tom lane
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Teodor Sigaev | 2018-03-27 15:09:17 | Re: Cast jsonb to numeric, int, float, bool |
| Previous Message | Dean Rasheed | 2018-03-27 14:58:09 | Re: [HACKERS] PATCH: multivariate histograms and MCV lists |