加载由双冒号::猪中分隔的文件

时间:2016-08-06 02:52:23

标签: apache-pig

以下是由双冒号(::)分隔的样本数据集。

1::Toy Story (1995)::Animation|Children's|Comedy    

我想从上面的数据集中提取三个字段作为movieID,title和genre。我已经为此编写了以下代码

movies = LOAD 'location/of/dataset/on/hdfs ' 
using PigStorage('::')
as 
(MovieID:int,title:chararray,genre:chararray);  

但我收到了以下错误

ERROR org.apache.pig.tools.grunt.Grunt - ERROR 1200: Pig script failed to  parse:  
 <file script.pig, line 1, column 9> pig script failed to validate:
 java.lang.RuntimeException: could not instantiate 'PigStorage' with arguments '[::]' 

1 个答案:

答案 0 :(得分:3)

使用MyRegExloader:你需要piggybank.jar。

REGISTER '/path/to/piggybank.jar'
A = LOAD '/path/to/dataset' USING org.apache.pig.piggybank.storage.MyRegExLoader('([^\\:]+)::([^\\:]+)::([^\\:]+)') 
      as (movieid:int, title:chararray, genre:chararray);
  

输出:

     

(1,玩具总动员(1995),动画|儿童喜剧)