[HIVE-471] Add reflect() UDF for reflective invocation of Java methods

• Type: New Feature
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.7.0
• Fix Version/s: 0.7.0
• Component/s: UDF
• Hadoop Flags: Reviewed
• Assignee: Edward Capriolo
• Reporter: Edward Capriolo
• Created: 05/May/09 01:35
• Updated: 16/Dec/11 23:59
• Resolved: 30/Aug/10 04:35

Description

There are many methods in java that are static and have no arguments or can be invoked with one simple parameter. More complicated functions will require a UDF but one generic one can work as a poor-mans UDF.

SELECT reflect("java.lang.String", "valueOf", 1), reflect("java.lang.String", "isEmpty")
FROM src LIMIT 1;

Issue Links

• relates to: HIVE-1877 Add java_method() as a synonym for the reflect() UDF