Hyunsik Choi created TAJO-1881:
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Summary: Add Javascript UDF support
Key: TAJO-1881
URL: https://issues.apache.org/jira/browse/TAJO-1881
Project: Tajo
Issue Type: New Feature
Reporter: Hyunsik Choi
Assignee: Hyunsik Choi
Fix For: 0.12.0
Basically, users should make their own java implementation for UDFs and create
the jar for them. In addition, users should distribute the jar across all
cluster nodes. It is very cumbersome work.
So, I propose javascript UDF, which can be loaded instantly in runtime. Also,
users can include their own UDF in their own SQL file.
Java 8 provides the better script engine system. Basically, it provides
Nashorn, which is a javascript engine. We can easily implement this feature by
using Nashorn.
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