Hi Ben, check with Result.isEmpty(). If that returns true the Result object has no results.
-- Lars ________________________________ From: Ben Kim <[email protected]> To: [email protected] Sent: Tuesday, May 29, 2012 12:34 AM Subject: Re: Null rowkey with empty get operation 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 <[email protected]> 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 [[email protected]] > Sent: Tuesday, May 29, 2012 6:42 AM > To: [email protected] > 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*
