Folks,
As this came up in a work situation, I was wondering a little bit
about the top-k issue. Right now, top-k is implemented (most easily,
I think) via a SELECT with a LIMIT and no OFFSET. 3 questions arise
from this.
1. Are there currently any optimizations specific to top-k in
On Thu, 13 Jan 2005, David Fetter wrote:
3. What kinds of top-k optimizations might (eventually) be included
in PostgreSQL?
See the TODO item:
Allow ORDER BY ... LIMIT 1 to select high/low value without sort or index
using a sequential scan for highest/lowest values
If only one value
David Fetter wrote:
Folks,
As this came up in a work situation, I was wondering a little bit
about the top-k issue. Right now, top-k is implemented (most easily,
I think) via a SELECT with a LIMIT and no OFFSET. 3 questions arise
from this.
I think the simplest LIMIT query doesn't make it easy
