private void assertTableIsEmpty(String table) throws Exception {
    Assert.assertEquals(TestTxnDbUtil.queryToString(hiveConf, "select * from " + table), 0,
        TestTxnDbUtil.countQueryAgent(hiveConf, "select count(*) from " + table));
  }
There aren't enough deltas to compact, but cleaning is needed because an insert overwrite
was executed.
ql/src/test/org/apache/hadoop/hive/ql/TestTxnCommands3.java