How to debug scripts in Pig?

There are several ways to debug scripts in Pig.

1. To run Pig scripts line by line and view the output of each step for debugging purposes, use grunt shell. You can enter the grunt shell by typing pig -x local in the terminal.
2. By adding the “explain” statement in a Pig script, you can display the execution plan, which helps analyze the script’s workflow and optimize script performance.
3. Adding an “illustrate” statement in a Pig script allows for the creation of a logical execution plan, making it easier to visualize the input-output relationships of each operation and aiding in understanding the script execution process.
4. Adding a DESCRIBE statement in a Pig script allows you to view the data structure and field types, helping to identify any issues during the data processing process.
5. Add a STORE statement in your Pig script to save intermediate results to a file, making it easier to view and verify data processing results.

By following the above methods, you can effectively debug Pig scripts, identify issues, and optimize script performance.