布爾列加載爲NULL

Question

我有以下輸入csv文件

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

我創建使用這些命令和加載數據的一個蜂房表在它

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; 

然而現在當我查詢配置單元中的數據

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

爲什麼布爾列變爲空？我也嘗試改變案例。

Answer 1

請在FALSE之前修剪前導空格並嘗試。

我上述輸入測試如下，你可以看到在輸出的區別：

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

我得到的結果在蜂巢爲：

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