[CASSANDRA-11392] Add auto import java.util for UDF code block

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.6
• Component/s: Legacy/CQL

Environment

C* 3.4

• Assignee: DuyHai Doan
• Reporter: DuyHai Doan

Authors

DuyHai Doan

Reviewers

Robert Stupp

• Created: 21/Mar/16 15:17
• Updated: 16/Apr/19 09:30
• Resolved: 23/Mar/16 13:49

Description

Right now, when creating Java source code for UDF, since we cannot define import, we need to use fully qualified class name, ex:

CREATE FUNCTION toSet(li list<text>)
CALLED ON NULL INPUT
RETURNS text
LANGUAGE java
AS $$
    java.util.Set<String> set = new java.util.HashSet();
    for(String txt: list) {
        set.add(txt);
    }
    return set;
$$;

Classes from java.util package are so commonly used that it makes developer life easier to import automatically java.util.* in the JavaUDF base class so that developers don't need to use FQCN for common classes.

The only drawback I can see is the risk of class name clash but since:

1. it is not allow to create new class
2. classes that can be used in UDF are restricted

I don't see serious clash name issues either

snazy WDYT ?