From: | Bruce Momjian <bruce(at)momjian(dot)us> |
---|---|
To: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
Cc: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: TODO list updates |
Date: | 2015-10-16 15:20:59 |
Message-ID: | 20151016152059.GD32496@momjian.us |
Views: | Raw Message | Whole Thread | Download mbox | Resend email |
Thread: | |
Lists: | pgsql-hackers |
On Fri, Oct 16, 2015 at 12:02:03PM -0300, Alvaro Herrera wrote:
> Bruce Momjian wrote:
>
> > Are you suggesting I remove those links? It is kind of odd to have
> > links to patches for features we don't want, or just keep it?
>
> No, quite the contrary -- I think the links allow some other person
> research the issue including the history of patches and discussion, and
> decide for themselves whether the feature is right to be rejected.
I think on-disk bitmap indexes would only beat GIN indexes in a
read-only database on low-cardinality columns. For example, if you had
a purchase_log table and wanted to know all the "blue" and "large" items
sold at a specific store, I can see on-disk bitmap indexes doing well
there. If you added the product number, or needed read/write, I think
GIN would win. I just don't think we have enough deployments who need
what on-disk bitmap are best at.
--
Bruce Momjian <bruce(at)momjian(dot)us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ As you are, so once was I. As I am, so you will be. +
+ Roman grave inscription +
From | Date | Subject | |
---|---|---|---|
Next Message | kolo hhmow | 2015-10-16 16:00:42 | Re: pam auth - add rhost item |
Previous Message | Robert Haas | 2015-10-16 15:20:19 | Re: pam auth - add rhost item |