得分：2.08 Your program fails the following test cases: [judge_whether_use_index_on_single_attribute] According to same sql collection running time gap, we think you actually not use index on single_attribute based query.
得分：2.08 Your program fails the following test cases: [judge_whether_use_index_on_single_attribute] According to same sql collection running time gap, we think you actually not use index on single_attribute based query.