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This article shows you how to analyze variables, arguments, and parameters in kettle. The content is concise and easy to understand. It will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

Prior to kettle 3.2, there were only variable and argument, so the Sinicization of these two words on GUI are variables and parameters, respectively.

But in kettle 3.2, the concept of parameter is introduced.

Http://jira.pentaho.com/browse/PDI-1381

[@ more@] the full name of the newly added parameters in kettle is Named parameters, which is relative to the previous Positional arguments through Named parameters. The previous Positional arguments is a maximum of 10 command line parameters that can be set, which can be distinguished by the position of the command line arguments. Named parameters, on the other hand, can be distinguished by name, and the setting parameters can be set by / param:name=value on the command line, and / listparam can list a parameter defined in ktr or kjb.

On the issue of Sinicization, parameter and argument have similar meanings in Chinese. After a survey, there is a difference between argument and parameter.

Argument [computer] arguments, parameters. It is mainly the number of quoted data.

Parameter "parameter (variable) number, parameter (variable) quantity", also means "bound", which refers to the parameter in the function, which is used to pass the value.

Originally, argument was supposed to be translated as "argument", but now it has been translated into "parameter", which makes parameter difficult to translate. And all three words appear in the "run" window at the same time. It is more likely to cause confusion in use, it is better not to translate it, keep it as it is, or translate argument into "position parameter" and parameter into "named parameter", which is closer to the actual meaning.

The above is how to analyze variables, arguments, and parameters in kettle. Have you learned any knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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