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嗨,我有一个这样的猪脚本。在做foreach语句时,它会抛出无效的标量投影错误。这里是我的代码。foreach中的标量投影无效
a = load 'file' using PigStorage(':');
b = group a by ($1, $7, $11);
c = foreach b generate flatten(group), COUNT(a) as (cnt: int);
d = filter c by cnt>1;
e = foreach d generate flatten(a) ;
如下所示
<line 6, column 31> Invalid scalar projection: a : A column needs to be projected from a relation for it to be used as a scalar
该错误的任何帮助将不胜感激。
我昨天张贴了这个代码作为一个答案。如果你在'$ 1,$ 7,$ 11'分组后没有得到任何重复的行,你的关系'd'将是空的,因此当你试图实现关系'e'时,你会得到这个错误。 – philantrovert
谢谢philan ... – Rakshita