@Test public void testKeysOnlyPredicate() { RangeSlicesCounterQuery<String, String> rangeSlicesQuery = HFactory.createRangeSlicesCounterQuery(keyspace, se, se); QueryResult<OrderedCounterRows<String, String>> result = rangeSlicesQuery.setColumnFamily(cf).setKeys("", "").setReturnKeysOnly().execute(); OrderedCounterRows<String, String> orderedRows = result.get(); CounterRow<String, String> row = orderedRows.iterator().next(); assertNotNull(row.getKey()); assertEquals(0,row.getColumnSlice().getColumns().size()); result = rangeSlicesQuery.setColumnNames("alpha","beta").setRowCount(5).execute(); orderedRows = result.get(); row = orderedRows.iterator().next(); assertNotNull(row.getKey()); assertEquals(2,row.getColumnSlice().getColumns().size()); } }