从Pig中的单行输入生成多行输出

问题描述

我的要求是通过在Pig脚本中使用单行输入来生成多行输出.有什么可能的解决方案?

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

该想法是将输入行转换为包，然后将其展平.这可能是2种情况:

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

阅读文字:

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，然后对其进行透视，请参见使用Apache Pig的透视表

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

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