Rows in decreasing order

[Casey Deccio <ca...@deccio.net>]

Hi,

I'm working with Cassandra 0.7.0-beta3.  Given rows with keys 1, 2, 3,
I'd like to be able to search on key 4 (non-existent) and get row 3
(and possibly the n rows before in a range).  I've tried several
options, but I keep getting an empty range.  What am I missing?

Thanks,
Casey

Re: Rows in decreasing order

[Casey Deccio <ca...@deccio.net>]

On Sun, Nov 14, 2010 at 12:50 AM, Jonathan Ellis <jb...@gmail.com> wrote:
> As you may have guessed from the lack of a "reversed" option on the
> range slice api, backward scans are not supported.  The standard thing
> to do is load the keys you are interested in as columns to a row.
>

That makes sense.  Just needed a different way of thinking about it.
Thanks for the clarification.

Casey

Re: Rows in decreasing order

[Jonathan Ellis <jb...@gmail.com>]

As you may have guessed from the lack of a "reversed" option on the
range slice api, backward scans are not supported.  The standard thing
to do is load the keys you are interested in as columns to a row.

On Sat, Nov 13, 2010 at 3:33 PM, Casey Deccio <ca...@deccio.net> wrote:
> Hi,
>
> I'm working with Cassandra 0.7.0-beta3.  Given rows with keys 1, 2, 3,
> I'd like to be able to search on key 4 (non-existent) and get row 3
> (and possibly the n rows before in a range).  I've tried several
> options, but I keep getting an empty range.  What am I missing?
>
> Thanks,
> Casey
>



-- 
Jonathan Ellis
Project Chair, Apache Cassandra
co-founder of Riptano, the source for professional Cassandra support
http://riptano.com