Devin Petersohn created SPARK-55792:
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Summary: Optimize DataFrame.diff axis=0 to avoid unpartitioned
Window
Key: SPARK-55792
URL: https://issues.apache.org/jira/browse/SPARK-55792
Project: Spark
Issue Type: Bug
Components: Pandas API on Spark
Affects Versions: 4.1.1
Reporter: Devin Petersohn
DataFrame.diff(axis=0) currently uses Spark's Window without a partition
specification, which will have scaling issues for large datasets. We should try
to optimize away the unbounded window (e.g., by using a partitioned window
similar to other projects in the space).
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