hadoop-streaming - w3toppers.com

Importing text file : No Columns to parse from file

Using try and except just lets you continue in spite of errors and handle them. It won’t magically fix your errors. read_csv expects csv files, which your input is obviously not. A quick look into the documentation: delim_whitespace : boolean, default False Specifies whether or not whitespace (e.g. ‘ ‘ or ‘ ‘) will be … Read more

Pivot table with Apache Pig

You can do it in 2 ways: 1. Write a UDF which returns a bag of tuples. It will be the most flexible solution, but requires Java code; 2. Write a rigid script like this: inpt = load ‘/pig_fun/input/pivot.txt’ as (Id, Column1, Column2, Column3); bagged = foreach inpt generate Id, TOBAG(TOTUPLE(‘Column1’, Column1), TOTUPLE(‘Column2’, Column2), TOTUPLE(‘Column3’, … Read more