Takuya Ueshin created SPARK-2327:
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Summary: Fix nullabilities of Join/Generate/Aggregate.
Key: SPARK-2327
URL: https://issues.apache.org/jira/browse/SPARK-2327
Project: Spark
Issue Type: Bug
Components: SQL
Reporter: Takuya Ueshin
Fix nullabilities of Join/Generate/Aggregate because:
- Output attributes of opposite side of {{OuterJoin}} should be nullable.
- Output attributes of generater side of {{Generate}} should be nullable if
{{join}} is {{true}} and {{outer}} is {{true}}.
- {{AttributeReference}} of {{computedAggregates}} of {{Aggregate}} should be
the same as {{aggregateExpression}}'s.
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