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https://issues.apache.org/jira/browse/SPARK-44005?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Allison Wang updated SPARK-44005:
---------------------------------
    Description: 
Currently, if you have a UDTF like this:
{code:java}
class TestUDTF:
    def eval(self, a: int):
        yield a {code}
and run the UDTF, it will fail with a confusing error message like
{code:java}
Unexpected tuple 1 with StructType {code}
Note this works when arrow is enabled. We should support this use case for 
regular UDTFs.

  was:
Currently, if you have a UDTF like this:
{code:java}
class TestUDTF:
    def eval(self, a: int):
        yield a {code}
and run the UDTF, it will fail with a confusing error message like
{code:java}
Unexpected tuple 1 with StructType {code}
We should support this use case.


> Support returning non-tuple values for regular Python UDTFs
> -----------------------------------------------------------
>
>                 Key: SPARK-44005
>                 URL: https://issues.apache.org/jira/browse/SPARK-44005
>             Project: Spark
>          Issue Type: Sub-task
>          Components: PySpark
>    Affects Versions: 3.5.0
>            Reporter: Allison Wang
>            Priority: Major
>
> Currently, if you have a UDTF like this:
> {code:java}
> class TestUDTF:
>     def eval(self, a: int):
>         yield a {code}
> and run the UDTF, it will fail with a confusing error message like
> {code:java}
> Unexpected tuple 1 with StructType {code}
> Note this works when arrow is enabled. We should support this use case for 
> regular UDTFs.



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