Jefferson V created SPARK-31943:
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Summary: SPARK-31500 introduces breaking changes in 2.4.6
Key: SPARK-31943
URL: https://issues.apache.org/jira/browse/SPARK-31943
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.4.6
Reporter: Jefferson V
[31500|[https://github.com/apache/spark/pull/28351/files]] introduced
unimplemented fields of the `Collect` class that cause extensions of that class
to fail unless the spark version is pinned to `2.4.5`. Since this was a minor
version bump, seems like this wasn't desired.
I believe we should be able to at least put default values:
`convertToBufferElement(value: Any): Any = InternalRow.copyValue(value)`
`bufferElementType: DataType = child.dataType`
and restore the `override def eval` in `Collect`, to support compatibility with
2.4.5 while allowing implementers in that file to override them to fix the bug.
Since the abstract `Collect` is currently not designed to fix the bug (just
provide tools that can be implemented to fix it), this change wouldn't
undermine the bug fix, just add backwards compatibility to 2.4.5.
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