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From David Boxenhorn <da...@lookin2.com>
Subject Re: list of columns
Date Sun, 16 May 2010 09:37:25 GMT
Bill, I am a new user of Cassandra, so I've been following this discussion
with interest. I think the answer is "no", except for the brute force method
of looping through all your data. It's like asking for a list of all the
files on your C: drive. The term "column" is very misleading, since
"columns" are really leaves of a tree structure, not columns of a tabular
structure.

Anybody want to tell me I'm wrong?

BTW, Bill, I think we've corresponded before, here:
http://www.dehora.net/journal/2004/04/whats_in_a_name.html

On Fri, May 14, 2010 at 2:23 AM, Bill de hOra <bill@dehora.net> wrote:

> A SlicePredicate/SliceRange can't exclude column values afaik.
>
> Bill
>
>
> Jonathan Shook wrote:
>
>> get_slice
>>
>> see: http://wiki.apache.org/cassandra/API under get_slice and
>> SlicePredicate
>>
>> On Thu, May 13, 2010 at 9:45 AM, Bill de hOra <bill@dehora.net> wrote:
>>
>>> get_count returns the number of columns, not the names of those columns?
>>> I
>>> should have been specific, by "list the columns", I meant "list the
>>> column
>>> names".
>>>
>>> Bill
>>>
>>> Gary Dusbabek wrote:
>>>
>>>> We have get_count at the thrift level.  You supply a predicate and it
>>>> returns the number of columns that match.  There is also
>>>> multi_get_count, which is the same operation against multiple keys.
>>>>
>>>> Gary.
>>>>
>>>>
>>>> On Thu, May 13, 2010 at 04:18, Bill de hOra <bill@dehora.net> wrote:
>>>>
>>>>> Admin question - is there a way to list the columns for a particular
>>>>> key?
>>>>>
>>>>> Bill
>>>>>
>>>>>
>>>
>

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