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From N Keywal <nkey...@gmail.com>
Subject Re: Null rowkey with empty get operation
Date Tue, 29 May 2012 10:26:43 GMT
There is a one to one mapping between the result and the get arrays;
so the result for rowkeys[i] is in results[i].
That's not what you want?

On Tue, May 29, 2012 at 9:34 AM, Ben Kim <benkimkimben@gmail.com> wrote:
> Maybe I showed you a bad example. This makes more sense when it comes to
> using List<Get>
> For instance,
>
> List<Get> gets = new ArrayList();
> for(String rowkey : rowkeys){
>  Get get = new Get(Bytes.toBytes(rowkey));
>  get.addFamily(family);
>  Filter filter = new QualifierFilter(CompareOp.NOT_EQUAL, new
> BinaryComparator(item));
>  get.setFilter(filter);
>  gets.add(get);
> }
> Result[] results = table.get(get);
>
> Now I have multiple results, I need to find the rowkey of the result that
> has no keyvalue.
> but results[0].getRow() is null if results[0] has no keyvalue.  so it's
> hard to derive which row the empty result belongs to :(
>
> Thank you for your response,
> Ben
>
>
>
> On Tue, May 29, 2012 at 2:33 PM, Anoop Sam John <anoopsj@huawei.com> wrote:
>
>> Hi Ben,
>>      In HBase rowkey exists with KVs only. As in your case there is no KVs
>> in the result, and so no rowkey. What is the use case that you are
>> referring here? When you issued Get with a rowkey and empty result for that
>> , you know the rowkey already right? I mean any specific reason why you try
>> to find the rowkey from the result object?
>>
>> -Anoop-
>>
>> ________________________________________
>> From: Ben Kim [benkimkimben@gmail.com]
>> Sent: Tuesday, May 29, 2012 6:42 AM
>> To: user@hbase.apache.org
>> Subject: Null rowkey with empty get operation
>>
>> I have following Get code with HBase 0.92.0
>>
>> Get get = new Get(Bytes.toBytes(rowkey));
>> get.addFamily(family);
>> Filter filter = new QualifierFilter(CompareOp.NOT_EQUAL, new
>> BinaryComparator(item));
>> get.setFilter(filter);
>> Result r = table.get(get);
>>
>> System.out.println(r);  // (1) prints "keyvalues=NONE"
>> System.out.println(Bytes.toString(r.getRow()));  // (2) throws
>> NullpointerException
>>
>>
>>
>> printing out the result shows that all columns in a row was filtered out.
>> but i still want to print out the row key of the empty result.
>> But the value of r.getRow() is null
>>
>> Shouldn't r.getRow() return the rowkey even if the keyvalues are emtpy?
>>
>>
>> --
>>
>> *Benjamin Kim**
>> benkimkimben at gmail*
>>
>
>
>
> --
>
> *Benjamin Kim*
> **Mo : +82 10.5357.0521*
> benkimkimben at gmail*

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