Hi! On Sat, Feb 7, 2015 at 12:45 PM, Stas Kelvich <stas.kelv...@gmail.com> wrote:
> I had updated old patch with kNN operators for cube data structures. > Copying description from old message: > > Following distance operators introduced: > > <#> taxicab distance > <-> euclidean distance > <=> chebyshev distance > > For example: > SELECT * FROM objects ORDER BY objects.coord <-> '(137,42,314)'::cube > LIMIT 10; > > Also there is operator "->" for selecting ordered rows directly from index. > This request selects rows ordered ascending by 3rd coordinate: > > SELECT * FROM objects ORDER BY objects.coord->3 LIMIT 10; > > For descendent ordering suggested syntax with minus before coordinate. > This request selects rows ordered descending by 4th coordinate: > > SELECT * FROM objects ORDER BY objects.coord->-4 LIMIT 10; > I've checked the patch. The first notes are so: 1) Check coding style, in particular braces. Postgres coding style require using it for multiline statements. 2) Update documentation according to new features. ------ With best regards, Alexander Korotkov.
