我有如下样本数据:
O/P:
(A,{(p,10)})
(B,{(q,40),(p,30)})
(C,{(t,60)},(q,20))
将其存储到PIG后,我需要输出如下:
Lo = load 'pivot.txt' using PigStorage (',') as (id:chararray, code:chararray, key:chararray, value:int);
Aa = group L by (code);
Bb = foreach Aa {AUX = foreach Lo generate $0,$2,$3;generate group, AUX;}`
dump Bb:
(A,{(1,p,10)})
(B,{(3,q,20),(3,p,30),(2,q,20)})
(C,{(3,t,60),(3,q,20)})
我们可以删除id,并且需要输出添加与特定代码的键匹配的所有值的总和。在上面的例子中,我们可以看到代码B-q,20是两次,因此被添加并成为q,40。
以下是我的代码,但无法获得准确的输出:
<?xml version="1.0" encoding="UTF-8"?>
<company>
<companyname>capgemini</companyname>
<address>mumbai</address>
<department>
<dname>software</dname>
<deptphoneno>9876543210</deptphoneno>
<deptfaxno>0447654321</deptfaxno>
<deptemail>soft@capgemini.com</deptemail>
<employee>
<empid>101</empid>
<ename>rajat</ename>
<emailid>rajat@capgemini.com</emailid>
<phoneno>9876543211</phoneno>
</employee>
<contractemployee>
<name>jade</name>
<phoneno>9882507167</phoneno>
</contractemployee>
</department>
</company>
我无法继续前进,非常感谢帮助。
谢谢, Rohith
答案 0 :(得分:3)
猪脚本:
input_data = LOAD 'input.csv' USING PigStorage(',') AS (id:int,code:chararray,key:chararray,value:int);
req_stats = FOREACH(GROUP input_data BY (code,key)) GENERATE FLATTEN(group) AS (code,key), SUM(input_data.value) AS value;
req_stats_fmt = FOREACH(GROUP req_stats BY code) GENERATE group AS code, req_stats.(key,value);
DUMP req_stats_fmt;
输入:
1,A,p,10
2,B,q,20
3,B,p,30
3,B,q,20
3,C,t,60
3,C,q,20
输出:DUMP req_stats_fmt
(A,{(p,10)})
(B,{(q,40),(p,30)})
(C,{(t,60),(q,20)})