A = load 'a.txt' as (id, a1);
B = load 'b.txt as (id, b1);
C = join A by id, B by id;
D = foreach C generate id,a1,b1;
dump D;
第4行失败:
Invalid field projection. Projected field [id] does not exist in schema
我试图改为A.id,但最后一行失败了: ERROR 0: Scalar has more than one row in the output.
Apache Pig中一个非常常见的错误消息是:
错误1066:无法打开别名的迭代器
有几个问题提到了这个错误,但没有一个提供处理它的通用方法.因此这个问题:
当你收到错误1066时该怎么办:无法打开别名的迭代器？