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

这出现在 另一个问题，但您可以在命令行中指明输入参数并在加载时使用该参数，例如:

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，则$input"是传递给您提供的任何输入的脚本的内容.

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.

这篇关于Hadoop Pig:传递命令行参数的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！