incubator-cassandra-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Todd Nine <t...@spidertracks.com>
Subject Re: Status of LT LTE without EQ op for 0.7 release
Date Wed, 13 Oct 2010 01:00:02 GMT
Fair enough!  


Thanks Jonathan.


todd 
SENIOR SOFTWARE ENGINEER

todd nine| spidertracks ltd |  117a the square 
po box 5203 | palmerston north 4441 | new zealand 
P: +64 6 353 3395 | M: +64 210 255 8576  
E: todd@spidertracks.co.nz W: www.spidertracks.com 





On Tue, 2010-10-12 at 18:47 -0500, Jonathan Ellis wrote:

> On Tue, Oct 12, 2010 at 6:34 PM, Todd Nine <todd@spidertracks.com> wrote:
> > Currently there is only indexing for LT and LTE expression when an EQ
> > operator is present.  Will it be possible to use the LT and LTE ops
> > without an EQ by the 0.7.0 release?
> 
> No.
> 
> >  If not, which of the following
> > would be more efficient?
> >
> > 1. Creating a dummy column of 1 byte that is indexed.
> 
> This is basically the same as doing a full range scan, only less efficient.
> 
> > 2. Use my previous indexing scheme of 2 Super CF for longs and strings
> > to get my < <= operations.  Where I use the following scheme.
> 
> I'm not sure I follow but if it's better than doing a full range scan
> then it is better than 1. :)
> 

Mime
  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message