b = new KeyValue(Bytes.toBytes("table,2222.bbb"), now);
assertTrue(c.compare(a, b) < 0);
a = new KeyValue(Bytes.toBytes("table,,aaaa"), now);
b = new KeyValue(Bytes.toBytes("table,111,bbb"), now);
assertTrue(c.compare(a, b) < 0);
a = new KeyValue(Bytes.toBytes("table,111,aaaa"), now);
b = new KeyValue(Bytes.toBytes("table,111,bbb"), now);
assertTrue(c.compare(a, b) < 0);