Xiao Li created SPARK-12505:
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Summary: Pushdown a Limit on top of a Outer-Join
Key: SPARK-12505
URL: https://issues.apache.org/jira/browse/SPARK-12505
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 1.5.0, 1.6.0
Reporter: Xiao Li
"Rule that applies to a Limit on top of an OUTER Join. The original Limit won't
go away after applying this rule, but additional Limit node(s) will be created
on top of the outer-side child (or children if it's a FULL OUTER Join). "
– from https://issues.apache.org/jira/browse/CALCITE-832
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