本文基于hive1.1.0-cdh5.12.1

要求：通过sql生成一段连续的日期，入2021-01-01至2021-01-31

参考结果：

dt

2021-01-01

2021-01-02

2021-01-03

2021-01-04

参考实现：

--由于hive不能递归，所有使用posexplode生成连续序号

with t as  
(
select  date_add( to_date('2021-01-01'),i) as dt -- 基础日期
from (select  30 as days ) t --需要加多少天
LATERAL VIEW 
posexplode(split(repeat(',',days),',')) pe as i, x 
)
select * from t;
+-------------+--+
|    t.dt     |
+-------------+--+
| 2021-01-01  |
| 2021-01-02  |
| 2021-01-03  |
| 2021-01-04  |
| 2021-01-05  |
| 2021-01-06  |
| 2021-01-07  |
| 2021-01-08  |
| 2021-01-09  |
| 2021-01-10  |
| 2021-01-11  |
| 2021-01-12  |
| 2021-01-13  |
| 2021-01-14  |
| 2021-01-15  |
| 2021-01-16  |
| 2021-01-17  |
| 2021-01-18  |
| 2021-01-19  |
| 2021-01-20  |
| 2021-01-21  |
| 2021-01-22  |
| 2021-01-23  |
| 2021-01-24  |
| 2021-01-25  |
| 2021-01-26  |
| 2021-01-27  |
| 2021-01-28  |
| 2021-01-29  |
| 2021-01-30  |
| 2021-01-31  |
+-------------+--+