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From rohit bhatia <rohit2...@gmail.com>
Subject Re: Astyanax empty column check
Date Wed, 17 Oct 2012 09:58:05 GMT
See
"If you attempt to retrieve an entire row and it returns a result with
no columns, it effectively means that row does not exist."
Essentially a row without columns doesn't exist.. (except those with tombstones)
 from here
http://stackoverflow.com/questions/8072253/is-there-a-difference-between-an-empty-key-and-a-key-that-doesnt-exist


On Wed, Oct 17, 2012 at 2:17 PM, Xu Renjie <xrjxrjxrjnet@gmail.com> wrote:
> Sorry for the version, I am using 1.0.1 Astyanax.
>
>
> On Wed, Oct 17, 2012 at 4:44 PM, Xu Renjie <xrjxrjxrjnet@gmail.com> wrote:
>>
>> hello guys,
>>    I am currently using Astyanax as a client(new to Astyanax). But I am
>> not clear how to differentiate the following 2 situations:
>> a. A row which has only key without columns
>> b. No this row in database.
>>
>> Since when I use RowQuery to query Cassandra with given key, both the
>> above two situations will return a ColumnList
>> with size 0. And also I didn't find other api can handle this.
>> Do you have any better way for this? Thanks in advance.
>> Cheers,
>> Xu
>
>

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