Josh Levy created PIG-2705:
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Summary: outputSchema modification from scripting UDFs
Key: PIG-2705
URL: https://issues.apache.org/jira/browse/PIG-2705
Project: Pig
Issue Type: Improvement
Affects Versions: 0.10.0, 0.9.2
Reporter: Josh Levy
The examples for @schemaFunction that I've seen on the web
(http://pig.apache.org/docs/r0.10.0/udf.html#decorators) tend to be trivial
ones that return the same schema passed in. I had a problem where I wrote a
python udf that added a new field into a tuple in a bag. I ended up not
specifying schema in python and then casting in pig. How does the community
feel about making it easier to generate a dynamic schema from a scripting UDF?
This could be done by modifying JythonFunction.outputSchema to handle
outputSchemaFunc returning a string like @outputSchema does, or by exposing a
public api that makes it easier to manipulate
org.apache.pig.impl.logicalLayer.schema.Schema
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