Pig脚本无法使用Amazon EMR

Question

我无法使用此脚本：

raw = LOAD 's3://xxxxxxxxx/*' AS (name:chararray, year:float, occurrences:float, books:float);
B = GROUP raw BY name;
C = FOREACH B GENERATE B.name, (SUM(B.occurrences) / SUM(B.books)) AS average;
D = ORDER C BY average DESC;
E = LIMIT D 10;
STORE E INTO 's3://xxxxxx';

Answer 1

声明C不正确，您无法使用name,occurrences and books访问变量Relation B。这应该只能由relation raw访问。你能改变你的stmt C这样的东西吗？

C = FOREACH B GENERATE group, SUM(raw.occurrences)/SUM(raw.books) AS average;

此处group引用变量name

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