[datatable-help] Secondary keys

[Chinmay Patil]

I just used the terminology that was used in issue
https://r-forge.r-project.org/tracker/index.php?func=detail&aid=1007&group_id=240&atid=978
by Matt.

Essentially, it would mean that whole table is also pre-sorted by some
other column than it's primary key and that sort order is also saved.
Perhaps, Matt would shed some light on it?


On Wed, Oct 9, 2013 at 11:56 AM, Eduard Antonyan
<eduard.antonyan at gmail.com>wrote:

> I understand the problem you want solved (fast search by e.g. second key
> element), but I don't understand what secondary keys would mean/be...?
> On Oct 8, 2013 10:48 PM, "Chinmay Patil" <chinmay.patil at gmail.com> wrote:
>
>> Eduard,
>>
>> Details of the issue raised are in this question.
>>
>> http://stackoverflow.com/questions/15769837/
>>
>>
>> On Tue, Oct 8, 2013 at 10:47 PM, Eduard Antonyan <
>> eduard.antonyan at gmail.com> wrote:
>>
>>> I don't think I understand what secondary keys are (supposed to be), can
>>> someone who knows please elaborate?
>>>
>>>
>>> On Sun, Oct 6, 2013 at 12:17 AM, Chinmay Patil <chinmay.patil at gmail.com>wrote:
>>>
>>>> Hi devs,
>>>>
>>>> I was wondering if there are any plans to implement this feature.
>>>>
>>>>
>>>> https://r-forge.r-project.org/tracker/index.php?func=detail&aid=1007&group_id=240&atid=978
>>>>
>>>> Alternatively, is there a way to refer to key of the data.table object
>>>> in "J" function used for subsetting?
>>>>
>>>> _______________________________________________
>>>> datatable-help mailing list
>>>> datatable-help at lists.r-forge.r-project.org
>>>>
>>>> https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/datatable-help
>>>>
>>>
>>>
>>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.r-forge.r-project.org/pipermail/datatable-help/attachments/20131009/bbbc37d3/attachment.html>