wangfei created SPARK-5583:
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Summary: Support unique join in hive context
Key: SPARK-5583
URL: https://issues.apache.org/jira/browse/SPARK-5583
Project: Spark
Issue Type: Improvement
Components: SQL
Affects Versions: 1.2.0
Reporter: wangfei
Support unique join in hive context:
FROM UNIQUEJOIN PRESERVE T1 a (a.key), PRESERVE T2 b (b.key), PRESERVE T3 c
(c.key)
SELECT a.key, b.key, c.key;
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