[jira] [Created] (PIG-4696) Empty map returned by a streaming_python udf wrongly contains a null key

["Cheolsoo Park (JIRA)" <ji...@apache.org>]

Cheolsoo Park created PIG-4696:
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             Summary: Empty map returned by a streaming_python udf wrongly contains a null key
                 Key: PIG-4696
                 URL: https://issues.apache.org/jira/browse/PIG-4696
             Project: Pig
          Issue Type: Bug
          Components: impl
    Affects Versions: 0.15.0
            Reporter: Cheolsoo Park
            Assignee: Cheolsoo Park
            Priority: Minor


To reproduce, please run the following query-
{code}
b = FOREACH a GENERATE (map[])udfs.empty_dict();
DUMP b;
{code}
where empty_dict() is a Python udf-
{code}
@outputSchema("map_out: []")
def empty_dict():
    return {}
{code}
This returns {{([])}} in jython while {{(\[null#\])}} in streaming_python.



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