Javascript support for Pig embedding and UDFs in scripting languages
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Key: PIG-1794
URL: https://issues.apache.org/jira/browse/PIG-1794
Project: Pig
Issue Type: New Feature
Components: impl
Affects Versions: 0.9.0
Reporter: Julien Le Dem
Fix For: 0.9.0
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
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