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https://issues.apache.org/jira/browse/SPARK-44734?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17777064#comment-17777064
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BingKun Pan commented on SPARK-44734:
-------------------------------------
[~phildakin]
Sorry, I didn't see that the previous PR is actually strongly related to this
PR. For completeness, you can continue with this PR and I will stop this work.
> Add documentation for type casting rules in Python UDFs/UDTFs
> -------------------------------------------------------------
>
> Key: SPARK-44734
> URL: https://issues.apache.org/jira/browse/SPARK-44734
> Project: Spark
> Issue Type: Sub-task
> Components: PySpark
> Affects Versions: 4.0.0
> Reporter: Allison Wang
> Priority: Major
>
> In addition to type mappings between Spark data types and Python data types
> (SPARK-44733), we should add the type casting rules for regular and
> arrow-optimized Python UDFs/UDTFs.
> We currently have this table in code:
> * Arrow:
> [https://github.com/apache/spark/blob/master/python/pyspark/sql/pandas/functions.py#L311-L329]
> * Python UDF:
> [https://github.com/apache/spark/blob/master/python/pyspark/sql/udf.py#L101-L116]
> We should add a proper documentation page for the type casting rules.
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