[NIFI-5492] UDF in Expression Language

• Type: New Feature
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 1.5.0, 1.6.0, 1.7.0, 1.7.1
• Component/s: Core Framework
• Labels: features patch
• Assignee: Unassigned
• Reporter: Ed Berezitsky
• Created: 07/Aug/18 04:48
• Updated: 16/Nov/21 18:12

Description

Set of functions available to use in expression language is limited by predefined ones.

This request is to provide an ability to plug in custom/user defined functions.

For example:

${exec('com.example.MyUDF', 'param1', 'param2')}

Should be able to support:

1. Multiple, not limited number of parameters (including zero params)
2. Param data types should  support all EL data types (dates, whole numbers, decimals, strings, booleans)