Hive案例陈述式参数类型与不匹配

Question

在Hive中运行以下代码时，出现以下错误：

04:08:12 [SELECT-0行，0.096秒] [代码：40000，SQL状态：42000]编译语句时出错：FAILED：SemanticException行0：-1参数类型不匹配''2018-02-14 ”：WHEN之后的表达式应与CASE之后的表达式具有相同的类型：预期为“ date”，但找到了“ boolean”

Select
            case shipped_date
                    when shipped_date between cast ('2018-02-01' as date) and cast ('2018-02-14' as date) then 1
                    when shipped_date between cast ('2018-02-18' as date) and cast( '2018-03-03'as date) then 2
                    when shipped_date between cast ('2017-02-01' as date) and cast ('2017-02-14'as date) then 3
                    when shipped_date between cast ('2017-03-12' as date) and cast ('2017-03-25' as date) then 4
                    when shipped_date between cast('2018-04-30' as date) and cast ('2018-05-13'as date) then 5
                    when shipped_date between cast ('2018-03-27' as date) and cast('2018-04-09'as date) then 6
                    when shipped_date between cast('2017-04-28'as date) and cast ('2017-05-14'as date) then 7
                    when shipped_date between cast ('2017-03-26' as date) and cast ('2017-04-11' as date) then 

            end as test_period,department_name
            from my_table;

有人知道如何解决此错误吗？

谢谢！

Answer 1

选择一种CASE语法，不要混用！

case EXPRESSION when EXPR_VALUE then OUT_VALUE

case when CONDITION then OUT_VALUE

因此，只需在CASE之后删除“ shipped_date”。