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From Yan Chunlu <springri...@gmail.com>
Subject Re: get mycf['rowkey']['column_name'] return 'Value was not found' in cassandra-cli
Date Tue, 23 Aug 2011 05:27:05 GMT
thanks a lot!

On Mon, Aug 22, 2011 at 10:14 PM, Edward Capriolo <edlinuxguru@gmail.com>wrote:

>
>
> On Mon, Aug 22, 2011 at 1:08 AM, Yan Chunlu <springrider@gmail.com> wrote:
>
>> connect to cassandra-cli and issue the list my cf I got
>>
>> RowKey: comments_62559
>> => (column=76616c7565,
>> value=28286c70310a4c3236373632334c0a614c3236373733304c0a614c3236373737304c0a614c3236373932324c0a614c3236373934364c0a614c3236383137314c0a614c3236383330334c0a614c3236383934314c0a614c3236383938394c0,
>> timestamp=1312791934150273)
>>
>>
>> and using
>> get mycf['comments_62559'] could return
>> (column=76616c7565,
>> value=28286c70310a4c3236373632334c0a614c3236373733304c0a614c3236373737304c0a614c3236373932324c0a614c3236373934364c0a614c3236383137314c0a614c3236383330334c0a614c3236383934314c0a614c3236383938394c0,
>> timestamp=1312791934150273)
>>
>>
>>
>> but
>> get mycf['comments_62559'][76616c7565];
>>
>> returns 'Value was not found'
>>
>> did I do something wrong?
>>
>
> Yes/Probably. Based on how you have defined your column families the data
> stored in your columns may be displayed differently. By default the storage
> is byte []. The Cli makes the decision to convert them to hex strings* (each
> major version 0.6. 0.7.X and 0.8.X of c* was selective about what it
> converted and why.)
>
> In any case there are two fixes:
> 1) Update the column family meta data and set the types correctly ASCII,
> UTF8, LONG, etc
>
> 2) Use the ASSUME keyword in the CLI to convert the rows to readable
> displays
> & when selecting columns use cli functions like : get
> CF[ascii('x')][ascii('y')] to make get what you are actually asking for.
>
> The CLI is more correct in current versions then it was in the past in
> regard to types and conversions, but if you do not define CF Meta Data it
> makes you scratch your head at times because it is not exactly clear that it
> is showing you a hex encoded byte [] and not an ascii string.
>
> Edward
>

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