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我有3个字段作为猪的关系:如何使动态场PIG关系
A = Load 'record.txt' as (name chararray,ID int,subject chararray,flag boolean);<br>
DUMP A;
(RAM,222,JAVA,true)
(RAM,111,DotNet,false)
(RAM,444,HTML,false)
(SAM,777,DotNet,true)
(SAM,333,JAVA,false)
如何产生额外的领域与姓名和ID的级联参考, 当标志为true,否则它会如下图所示:
(RAM,222,JAVA,true,RAM-222)
(RAM,111,DotNet,false,RAM-222)
(RAM,444,HTML,false,RAM-222)
(SAM,777,DotNet,true,SAM-777)
(SAM,333,JAVA,false,SAM-777)
使用下面的脚本,但它没有给出确切的结果。
A = Load 'demo.txt' as (name chararray,ID int,subject chararray,flag boolean);
B = FOREACH A GENERATE name,ID,subject,flag,CONCAT(name,ID) As reference;
DUMP B;
(RAM,222,JAVA,true,RAM-222)
(RAM,111,DotNet,false,RAM-111)
(RAM,444,HTML,false,RAM-444)
(SAM,777,DotNet,true,SAM-777)
(SAM,333,JAVA,false,SAM-333)
什么应该是CONCAT函数或者其他任何方式来获得确切的结果?
它工作正常。 – jay105