Alebraic udf Init and Intermediate functions should be able to return non tuple
data types
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Key: PIG-2234
URL: https://issues.apache.org/jira/browse/PIG-2234
Project: Pig
Issue Type: Improvement
Affects Versions: 0.9.0, 0.8.0
Reporter: Thejas M Nair
The exec() call to Algebraic UDF initial and intermediate classes are required
to return a Tuple. This has been done because the output is collected in a
DataBag and passed to Intermediate.exec() and Final.exec() calls, and DataBag
in pig needs to contain a Tuple. But this results in additional Tuple objects
getting created and also adds additional (de)serialization costs. Functions
such as COUNT, SUM are also having to wrap the initial and intermediate results
in Tuples.
The Algebraic interface needs to change to reduce the costs for udfs that don't
need an intermediate tuple .
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