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hive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;

但是现在我在hive中查询数据

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？我也试过改变案例。

Answer 1

请在FALSE之前修剪前方空格并尝试。

我用以上输入测试如下，你可以看到输出的差异：

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

我在hive中得到了结果：

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

Hive中的布尔列加载为NULL

1 个答案: