问题貌似出在TO_DAYS函数对1601-01-01这天的处理上了，也不知道这天有啥特殊含义。

你可以用下面这个SQL查一下

SELECT TO_DAYS(TO_DATE('1600-12-28','YYYY-MM-DD')) AS TD_16001228
      ,TO_DAYS(TO_DATE('1600-12-29','YYYY-MM-DD')) AS TD_16001229
      ,TO_DAYS(TO_DATE('1600-12-30','YYYY-MM-DD')) AS TD_16001230
      ,TO_DAYS(TO_DATE('1600-12-31','YYYY-MM-DD')) AS TD_16001231
      ,TO_DAYS(TO_DATE('1601-01-01','YYYY-MM-DD')) AS TD_16010101
      ,TO_DAYS(TO_DATE('1601-01-02','YYYY-MM-DD')) AS TD_16010102
      ,TO_DAYS(TO_DATE('1601-01-03','YYYY-MM-DD')) AS TD_16010103
      ,TO_DAYS(TO_DATE('1601-01-04','YYYY-MM-DD')) AS TD_16010104

查询结果应该与下面图里类似，1601-01-01这天的TO_DAYS结果退回了两天，与 1600-12-30 这天的值相同