[ARROW-15638] [Docs] UDF Documentation

• Type: Sub-task
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Component/s: Documentation
• External issue URL: https://github.com/apache/arrow/issues/31097
• Assignee: Unassigned
• Reporter: Vibhatha Lakmal Abeykoon
• Created: 10/Feb/22 01:10
• Updated: 11/Jan/23 11:38

Description

Document the usage of UDFs and important facts about the limitations and provide warnings to the user. 

For example:

System calls to fork, modify system attributes or runtime information and states can be harmful when executed via a UDF.