从Pig中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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