Yes, that is one of the possible solutions to your problem.
When you want to retrieve only the skills of a particular row just get the
columns with as start value "skill:".
A suggestion to your example might be to use a ~ in stead of : as
separator. A tilde is used less often in standard sentences, so you could
replace any of them in skills with some other character (e.g. a dash or
whitespace).
2012/3/27 Ben McCann <b...@benmccann.com>
> I was given one other suggestion (which may have been suggested earlier in
> this thread, but is clearer to me with an example). The suggestion was to
> use composite columns and have the first part of the key name be "skill"
> and the second part be the specific skill and then store a null value. I
> hope I understood this suggestion correctly.
>
> user: {
> 'name': 'ben',
> 'title': 'software engineer',
> 'company': 'google',
> 'location': 'orange county',
> 'skill:java': '',
> 'skill:html': '',
> 'skill:javascript': ''
> }
>
>
> On Tue, Mar 27, 2012 at 12:04 AM, samal <samalgo...@gmail.com> wrote:
>
>> YEAH! agree, it only matter for time bucket data.
>>
>>
>> On Tue, Mar 27, 2012 at 12:31 PM, R. Verlangen <ro...@us2.nl> wrote:
>>
>>> That's true, but it does not sound like a real problem to me.. Maybe
>>> someone else can shed some light upon this.
>>>
>>>
>>> 2012/3/27 samal <samalgo...@gmail.com>
>>>
>>>>
>>>>
>>>> On Tue, Mar 27, 2012 at 1:47 AM, R. Verlangen <ro...@us2.nl> wrote:
>>>>
>>>>> " but any schema change will break it "
>>>>>
>>>>> How do you mean? You don't have to specify the columns in Cassandra so
>>>>> it should work perfect. Except for the "skill~" is preserverd for your
>>>>> list.
>>>>>
>>>>
>>>> In case skill~ is decided to change to skill:: , it need to be handle
>>>> at app level. Or otherwise had t update in all row, read it first, modify
>>>> it, insert new version and delete old version.
>>>>
>>>>
>>>
>>>
>>> --
>>> With kind regards,
>>>
>>> Robin Verlangen
>>> www.robinverlangen.nl
>>>
>>>
>>
>
--
With kind regards,
Robin Verlangen
www.robinverlangen.nl
