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From "Santhosh Srinivasan (JIRA)" <j...@apache.org>
Subject [jira] Created: (PIG-320) The parser/type checker should use the getSchema method of UDFs to deduce return type/schema
Date Wed, 16 Jul 2008 21:25:31 GMT
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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