> Right, but to fully define a UDF, the JAVA_CLASS and JAVA_METHODS properties need to be defined so that the Teiid engine knows what to execute when the function is called in a SQL statement. No, the intent of this feature is to allow a virtual function that can be defined using the teiid procedure language.

Allow UDFs to call Teiid functions ---------------------------------- Key: TEIID-3270 URL: https://issues.jboss.org/browse/TEIID-3270 Project: Teiid Issue Type: Feature Request Components: Query Engine Reporter: Sanjeev Gour Assignee: Steven Hawkins Fix For: 8.11 Currently custom functions require the implementation on be in Java, there could be an alternative way to allow using Teiid expressions inside the custom functions. The related thread is here- https://developer.jboss.org/thread/251179