hive - Hive 中的 bool 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

我使用这些命令创建了一个配置单元表并在其中加载了数据

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;

但是现在当我查询 hive 中的数据时

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

为什么 bool 列变为空？我也尝试过更改大小写。

Answer 1

请在 FALSE 之前修剪前导空格并尝试。

我用上面的输入测试如下，你可以看到输出的不同:

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

我在 hive 中得到的结果是:

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