udf having project-star/project-range as argument has single tuple in argument
schema
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Key: PIG-2057
URL: https://issues.apache.org/jira/browse/PIG-2057
Project: Pig
Issue Type: Bug
Affects Versions: 0.8.0, 0.7.0, 0.9.0
Reporter: Thejas M Nair
Assignee: Thejas M Nair
When a udf has a project-star(*) or project-range-to-end (eg- $3 ..)as the
argument, then to find the appropriate matching udf class, pig type checker
(TypeCheckingRelVisitor) creates a UDF input schema that has a single tuple as
the argument. But at runtime, the udf will actually get an input that has the
expanded list of columns - not a tuple containing a single tuple as indicated
by schema used in typechecking.
The patch in PIG-1938 has fix for the case where input schema is present, as it
expands the project-star or project-range in that case. Project-range is
expanded even in input schema is not present, if it is not a project-to-end, as
the number of columns present in such cases is known.
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