Apache pig Pig：提取列不区分的记录

我想提取列不区分的记录，如何实现它

例如输入：

(user1, value1, value2)
(user1, value3, value4)
(user2, value5, value6)
(user3, value7, value8)
(user4, value9, value10)
(user4, value11, value12)

提取具有第1列重复值的记录后，输出为：

(user1, value1, value2)
(user1, value3, value4)
(user4, value9, value10)
(user4, value11, value12)

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提前多谢

请让我知道这是否适合您。出于测试目的，我使用value1和value2作为字符，但在实际代码中，将value1和value2更改为int或long

input.txt
user1,value1,value2
user1,value3,value4
user2,value5,value6
user3,value7,value8
user4,value9,value10
user4,value11,value12

PigScript
A = LOAD 'input.txt' USINg PigStorage(',') AS (user:chararray,value1:chararray,value2:chararray);
B = GROUP A BY user;
C = FOREACH B  GENERATE FLATTEN(A),COUNT(A) AS cnt;
D = FILTER C BY cnt >1;
E = FOREACH D GENERATE A::user,A::value1,A::value2;
DUMP E;

Output:
(user1,value1,value2)
(user1,value3,value4)
(user4,value9,value10)
(user4,value11,value12)

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@丹珠，如果我的回答有帮助，请将这个问题标记为已回答。