jiaan.geng created SPARK-34096:
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Summary: Improve performance for nth_value over unbounded
preceding window frame
Key: SPARK-34096
URL: https://issues.apache.org/jira/browse/SPARK-34096
Project: Spark
Issue Type: Sub-task
Components: SQL
Affects Versions: 3.2.0
Reporter: jiaan.geng
The current
{code:java}
UnboundedPrecedingOffsetWindowFunctionFrame
{code}
only support nth_value that respect nulls. So nth_value will execute
{code:java}
updateExpressions
{code}
multiple times.
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