Davies Liu created SPARK-14600:
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Summary: Push predicates through Expand
Key: SPARK-14600
URL: https://issues.apache.org/jira/browse/SPARK-14600
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Davies Liu
A grouping sets will be analyzed as Aggregate(Expand(Project)), the grouping
attributes came from Project, but have different meaning in Project (equal to
original grouping expression) and Expand (could be original grouping expression
or null), this does not make sense, because the attribute has different result
in different operator,
A better way could be Aggregate(Expand()), then we need to fix SQL
generation.
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