Hive 从原始外部 table 插入覆盖动态分区外部 table 失败，出现空指针异常。，

Question

我有一个包含四列的原始外部 table- Table 1 :

create external table external_partitioned_rawtable
(age_bucket String,country_destination String,gender string,population_in_thousandsyear int)
row format delimited fields terminated by '\t'
lines terminated by '\n' location '/user/HadoopUser/hive'

我想要一个外部 table，分区来自 Country_destination 和 gender.Table -2

create external table external_partitioned
(age_bucket String,population_in_thousandsyear int)
partitioned by(country_destination String,gender String)
row format delimited fields terminated by '\t'
lines terminated by '\n';

插入覆盖失败，出现空指针异常 -

insert overwrite  table  external_partitioned partition(country_destination,gender) <br>
select (age_bucket,population_in_thousandsyear,country_destination,gender) <br>
from external_partitioned_rawtable;

失败：NullPointerException 空

Answer 1

对于动态分区插入，在执行INSERT语句之前你必须执行hive的两个属性：

set hive.exec.dynamic.partition=true;
set hive.exec.dynamic.partition.mode=nonstrict;

然后执行插入语句（我已经修改）

insert overwrite  table  external_partitioned partition(country_destination,gender) 
select age_bucket,population_in_thousandsyear,country_destination,gender 
from external_partitioned_rawtable;

希望对你有帮助！！！