Impala AnalysisException：HAVING子句中不支持子查询

Question

我有一个查询，我在其中选择目标主机名（与用户代理字符串匹配），并根据使用Impala的不同srchostname进行分组。

select desthostname
from proxy_table 
where useragentstring = "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/538.1 (KHTML, like Gecko) Google Earth Pro/7.3.2.5491 Safari/538.1"
group by desthostname
having count(*) = (select count(distinct srchostname) from proxy_table);

但是我遇到了错误： AnalysisException: Subqueries are not supported in the HAVING clause.

您知道我该如何解决吗？

Answer 1

运行此：

select desthostname from
(select desthostname,count(*) as cnt
from proxy_table 
where useragentstring = "Mozilla/5.0 (Windows NT 6.2; Win64; x64) AppleWebKit/538.1 (KHTML, like Gecko) Google Earth Pro/7.3.2.5491 Safari/538.1"
group by desthostname) A where A.cnt in (select count(distinct srchostname) from proxy_table);