sql - Hive 查询未按预期工作

Question

id                      bigint                  from deserializer   
created_at              string                  from deserializer   
source                  string                  from deserializer   
favorited               boolean                 from deserializer   
retweeted_status        struct<text:string,user:struct<screen_name:string,name:string>,retweet_count:int>   from deserializer   
entities                struct<urls:array<struct<expanded_url:string>>,user_mentions:array<struct<screen_name:string,name:string>>,hashtags:array<struct<text:string>>> from deserializer   
text                    string                  from deserializer   
user                    struct<screen_name:string,name:string,friends_count:int,followers_count:int,statuses_count:int,verified:boolean,utc_offset:int,time_zone:string,location:string>    from deserializer   
in_reply_to_screen_name string                  from deserializer   

.

select  id from election order by election.retweeted_status.retweet_count desc  limit 10

此查询不起作用，错误是“SemanticException [错误 10002]：第 1:53 行无效列引用'retweeted_status'”

 select  * from election order by election.retweeted_status.retweet_count desc  limit 10

但是这个查询正在工作

Answer 1

查询按以下顺序执行

1 FROM 子句

2 WHERE 子句

3 GROUP BY 子句

4 HAVING 子句

5 选择子句

6 ORDER BY 子句

7个限制

当我们从 select 子句获得结果集后 order 执行，因为您没有在 select 子句中选择列 orderby 子句将无法找到列引用来执行操作。