我正在尝试在一堆hive表上运行describe,并希望创建一堆cte然后UNION它们。像这样:
With t1 as (describe sch1.tab1)
, t2 as (describe sch1.tab2)
, t3 as (describe sch1.tab3)
select *
from t1 UNION
select *
from t2 UNION
select *
from t3
不幸的是,当我尝试这样做时,我收到了这个错误:
Error while compiling statement: FAILED: ParseException line 1:15 Failed to recognize predicate 'describe'. Failed rule: 'identifier' in table name
有关如何执行此操作的任何建议吗?
答案 0 :(得分:0)
您可以在.hql中添加所有describe命令,并使用sort -u
命令执行UNION
。
hive -f desc_tables.hql | sort -u