将查询结果存储在配置单元变量中

问题描述

在Hive中，如何将查询的结果存储在变量中？
我试过了下面的命令：
SET hivevar：a =（Query）;

但是结果并不是这样，查询本身越来越多存储。
是否有任何存储结果的方法？

解决方案

Hive变量只不过是一种文本替换机制。 >
在解析和执行之前完成替换。

  hive>设置hivevar：v1 = se; 
 hive>设置hivevar：v2 = 1; 
 hive>设置hivevar：v3 = ec; 
 hive>设置hivevar：v4 = t 1+; 
 hive>设置hivevar：v5 = 2; 
 hive> $ {hivevar：V1} $ {hivevar：V2} $ {hivevar：V3} $ {hivevar：V4} $ {hivevar：V5}; 
 OK 
 3 
  

将查询结果作为参数传递给另一个查询从壳上完成，例如 -

  hive --hivevar x = $（hive -e'select 1 + 2'）-e'select $ {hivevar ：x} * 100'
  

In Hive,how to store the results of a query in a variable?I've tried the below command:SET hivevar:a=(Query);

But instead of the result,query itself is getting stored.Is there any way for storing the results?

解决方案

Hive variables are nothing but a text replacement mechanism.
The replacement is done before parsing and execution.

hive> set hivevar:v1=se;
hive> set hivevar:v2=l;
hive> set hivevar:v3=ec;
hive> set hivevar:v4=t 1+;
hive> set hivevar:v5=2;
hive> ${hivevar:v1}${hivevar:v2}${hivevar:v3}${hivevar:v4}${hivevar:v5};
OK
3

Passing a query result as an argument to another query can be done from the shell, e.g. -

hive --hivevar x=$(hive -e 'select 1+2') -e 'select ${hivevar:x}*100'

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