从猪的单行输入生成多行输出 [英] Generating multiple lines output from single line input in pig

问题描述

我的要求是在 pig 脚本中使用单行输入生成多行输出.可能的解决方案是什么?

My requirement is to generate multiple lines of output by using single line of input in pig scripting. What are the possible solutions?

推荐答案

这个想法是将你的输入行转换成一个包，然后将它压平.这里可能有两种情况:

The idea is to convert you input line into a bag and then flatten it. Here could be 2 cases:

阅读文本:

txt = load '/pig_fun/input/text.txt' using TextLoader();
words = foreach txt generate TOKENIZE($0);
pivoted = foreach words generate FLATTEN($0);
dump pivoted;

输入:

My requirement is to generate multiple lines of output by using single line of input in pig scripting.
What are the possible solutions?

输出:

(My)
(requirement)
(is)
(to)
(generate)
(multiple)
(lines)
(of)
(output)
(by)
(using)
(single)
(line)
(of)
(input)
(in)
(pig)
(scripting.)
(What)
(are)
(the)
(possible)
(solutions?)

阅读列然后旋转它们，请参阅使用 Apache Pig 透视表

Reading columns and then pivoting them see Pivot table with Apache Pig

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