Li Jin created SPARK-23861:
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Summary: Clarify behavior of default window frame boundaries with
and without orderBy clause
Key: SPARK-23861
URL: https://issues.apache.org/jira/browse/SPARK-23861
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 2.3.0
Reporter: Li Jin
Without an orderBy clause, the default window frame boundary is (rowFrame,
unbounded, unbouned). With an orderBy clause, the default window frame boundary
is (rangeFrame, unbouned, currentRow). This behavior is by design but is a bit
intuitive to people that are not very familiar with SQL window semantics. Let's
update the API doc to clarify that.
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