Hadoop Pig:传递命令行参数 [英] Hadoop Pig: Passing Command Line Arguments

问题描述

有没有办法做到这一点?例如，传递要处理的文件的名称等?

Is there a way to do this? eg, pass the name of the file to be processed, etc?

推荐答案

这显示在

This showed up in another question, but you can indicate the input parameter on the command line and use that when you are loading, for example:

命令行:

pig -f script.pig -param input = somefile.txt

pig -f script.pig -param input=somefile.txt

script.pig:

script.pig:

raw = LOAD'$ input'AS(...);

raw = LOAD '$input' AS (...);

请注意，如果您使用的是Amazon Web Services Elastic Map Reduce，那么对于您提供的任何输入，"$ input"就是传递给脚本的内容.

Note that if you are using the Amazon Web Services Elastic Map Reduce then the '$input' is what is passed to the script for any input you provide.

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