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From "Edward Capriolo (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6757) SliceQueryFilter access multiple ColumnSlice but not exposed to thrift
Date Sun, 23 Feb 2014 19:38:19 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13909859#comment-13909859
] 

Edward Capriolo commented on CASSANDRA-6757:
--------------------------------------------

The feature works like this:
{code}
    public void test_multi_slice() throws TException{
      ColumnParent cp = new ColumnParent();
      cp.setColumn_family("Standard1");
      ByteBuffer key = ByteBuffer.wrap("multi_slice".getBytes());
      for (char a = 'a'; a < 'z'; a++) {
        Column c1 = new Column();
        c1.setName((a+"").getBytes());
        c1.setValue(new byte [0]);
        c1.setTimestamp(System.nanoTime());
        server.insert(key, cp, c1, ConsistencyLevel.ONE);
      }
      
      MultiRangeSliceRequest req = new MultiRangeSliceRequest();
      req.setKey(key);
      req.setCount(1000);
      req.reversed = false;
      req.setColumn_parent(cp);
      
      ColumnSlice slice1 = new ColumnSlice();
      slice1.setStart("a".getBytes());
      slice1.setFinish("e".getBytes());
      
      ColumnSlice slice2 = new ColumnSlice();
      slice2.setStart("i".getBytes());
      slice2.setFinish("n".getBytes());
      List<ColumnSlice> slices= new ArrayList<ColumnSlice>();
      slices.add(slice1);
      slices.add(slice2);
      req.setColumn_slices(slices);
      List<ColumnOrSuperColumn> list = server.get_multi_range_slice(req);
      Assert.assertEquals(11, list.size());
      Assert.assertEquals( new String("a".getBytes()), new String(list.get(0).column.getName()));
      Assert.assertEquals( new String("c".getBytes()), new String(list.get(2).column.getName()));
      Assert.assertEquals( new String("k".getBytes()), new String(list.get(7).column.getName()));
    }
{code}

> SliceQueryFilter access multiple ColumnSlice but not exposed to thrift
> ----------------------------------------------------------------------
>
>                 Key: CASSANDRA-6757
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6757
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Edward Capriolo
>            Assignee: Edward Capriolo
>         Attachments: Cassandra-6757.1.diff
>
>
> Thrift has getSlice() which takes a key and a predicate. SliceQueryFilter can accept
multiple SliceRanges users should have access to this capability already found in Cassandra.



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