如何将键值对加载到hive表中?

时间:2015-03-20 03:58:54

标签: hadoop hive

以下是我的数据集:

Jun name="balaji" id=101

Mar name="kumar" id=102

创建表:

create table sample(month string,name string, id int)
row format delimited fields terminated by 'space' map keys terminated by '=';

结果:

select * from sample;      
JUN name="balaji" NULL
Mar name="kumar" NULL

预期结果:

JUN balaji 101

Mar kumar 102

请帮我解决这个问题。

1 个答案:

答案 0 :(得分:2)

创建如下表格:

create table sample(mnth string,names map<string,string>,ids map<string,int>)
row format delimited fields terminated by ' ' map keys terminated by '=';

选择查询应为:

  select mnth,names["name"],ids["id"]  from sample;

    result: 
      Jun   "balaji"    101
      Mar   "kumar" 102

如果您从示例中解雇select *

   Jun  {"name":"\"balaji\""}   {"id":101}
   Mar  {"name":"\"kumar\""}    {"id":102}

要访问地图中的每个值,您需要传递names["name"]