[PIG-1794] Javascript support for Pig embedding and UDFs in scripting languages

• Type: New Feature
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.9.0
• Component/s: impl
• Patch Info: Patch Available
• Hadoop Flags: Reviewed
• Assignee: Julien Le Dem
• Reporter: Julien Le Dem
• Created: 09/Jan/11 22:51
• Updated: 04/Aug/11 00:34
• Resolved: 23/Feb/11 23:02

Description

The attached patch proposes a javascript implementation for Pig embedding and UDFs in scripting languages.
It is similar to the Jython implementation and uses Rhino provided in the JDK.
some differences:

• output schema is provided by: <functionName>.outSchema="<schema>" as javascript does not have annotations or decorators but functions are first class objects
• tuples are converted to objects using the input schema (the other way around using the output schema)

The attached patch is not final yet. In particular it lacks unit tests.
See test/org/apache/pig/test/data/tc.js for the "transitive closure" example

See the following JIRAs for more context:
https://issues.apache.org/jira/browse/PIG-928
https://issues.apache.org/jira/browse/PIG-1479

Issue Links

• is related to: PIG-928 UDFs in scripting languages
• is related to: PIG-1479 Embed Pig in scripting languages
• is related to: PIG-1804 Alow Jython function to implement Algebraic and/or Accumulator interfaces