布尔列加载为NULL

Question

我有以下输入csv文件

10418872, fever, FALSE 
10418872, shortness of breath, FALSE 
10418872, shortness of breath, FALSE 
10418872, shortness of breath, FALSE 

我创建使用这些命令和加载数据的一个蜂房表在它

create database bpo; 
CREATE EXTERNAL TABLE bpo.adverse(patientId INT, symptom STRING, severe BOOLEAN) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' LINES TERMINATED BY '\n' STORED AS TEXTFILE LOCATION '/landingzone/hive/adverse'; 
LOAD DATA INPATH '/landingzone/adverse-effects.csv' INTO TABLE bpo.adverse; 

然而现在当我查询配置单元中的数据

10418872   fever NULL 
10418872   shortness of breath NULL 
10418872   shortness of breath NULL 
10418872   shortness of breath NULL 

为什么布尔列变为空？我也尝试改变案例。

Answer 1

请在FALSE之前修剪前导空格并尝试。

我上述输入测试如下，你可以看到在输出的区别：

10418872, fever,FALSE 
10418872, shortness of breath,FALSE 
10418872, shortness of breath, FALSE 
10418872, shortness of breath, FALSE 

我得到的结果在蜂巢为：

adverse.patientid adverse.symptom adverse.severe 
10418872   fever false 
10418872   shortness of breath false 
10418872   shortness of breath NULL 
10418872   shortness of breath NULL