The parser/type checker should use the getSchema method of UDFs to deduce
return type/schema
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Key: PIG-320
URL: https://issues.apache.org/jira/browse/PIG-320
Project: Pig
Issue Type: Bug
Components: impl
Affects Versions: types_branch
Reporter: Santhosh Srinivasan
Assignee: Santhosh Srinivasan
Fix For: types_branch
Currently, the parser/type checker uses the getReturnType to deduce the return
type of the user defined function (UDF). This mechanism is satisfactory only
for basic types (int, long, ...); for composite types (tuple, bag), the schema
is also required.The abstract class EvalFunc interface exposes the outputSchema
to deduce the return type/schema of the UDF. The parser/type checker should use
this method to figure out the return type/schema of the UDF and use it
appropriately.
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