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HBase, mail # user - PrefixFilter : not working for 'long' keys


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Re: PrefixFilter : not working for 'long' keys
Anil Gupta 2012-12-05, 07:26
Hi Mohammad,
Let me know the outcome of your experiments.

Best Regards,
Anil

On Dec 4, 2012, at 11:21 AM, Mohammad Tariq <[EMAIL PROTECTED]> wrote:

> Hello Anil,
>
>     I see. Your logic sounds appealing. I need to take a few test cases
> and test it properly. Thank you for the valuable respone.
>
> Regards,
>    Mohammad Tariq
>
>
>
> On Tue, Dec 4, 2012 at 11:01 PM, anil gupta <[EMAIL PROTECTED]> wrote:
>
>> Hi Mohammad,
>>
>> Suppose your rowkey is 345346654. Are you trying to match this row on the
>> basis of prefix 3453?
>> If yes, then the default PrefixFilter wont work. I am a little skeptic that
>> prefix like this will work because AFAIK byte[] of 3453 is not guaranteed
>> to be a prefix of byte[] of 345346654.
>> I have played with a rowkey which is a sequence of long and short. In my
>> case it works as long as i am matching the entire variable(long,short,byte)
>> in Prefix Filter.
>>
>> HTH,
>> Anil Gupta
>>
>> On Tue, Dec 4, 2012 at 6:36 AM, Mohammad Tariq <[EMAIL PROTECTED]> wrote:
>>
>>> Thank you for the quick response sir. I was thinking about the same
>> thing,
>>> but just wanted to ask on the list once before moving forward. I'll try
>> it
>>> out.
>>>
>>> Regards,
>>>    Mohammad Tariq
>>>
>>>
>>>
>>> On Tue, Dec 4, 2012 at 8:02 PM, ramkrishna vasudevan <
>>> [EMAIL PROTECTED]> wrote:
>>>
>>>> Ok, what i think can be done is try writing a custom filter like
>>>> PreFixFilter and use a Comparator that compares long.
>>>>
>>>> In case of SCVF it has a comparator passed to it.  So we can implement
>> a
>>>> comparator that compares long and pass it to the constructor of SCVF.
>>>>
>>>> Hope this helps.
>>>>
>>>> Regards
>>>> Ram
>>>>
>>>> On Tue, Dec 4, 2012 at 7:00 PM, Mohammad Tariq <[EMAIL PROTECTED]>
>>> wrote:
>>>>
>>>>> Hello list,
>>>>>
>>>>>    I am trying to use PrefixFilter on my table, whose rowkeys are of
>>>> type
>>>>> 'long'. But I am getting all the rows in the result. And if use the
>>> same
>>>>> code on rowkeys of type 'String' it is working perfectly fine. Need
>>> some
>>>>> help.
>>>>>
>>>>> Many thanks.
>>>>>
>>>>> Regards,
>>>>>    Mohammad Tariq
>>>>>
>>>>
>>>
>>
>>
>>
>> --
>> Thanks & Regards,
>> Anil Gupta
>>