Reynold Xin created SPARK-6380:
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Summary: Resolution of equi-join key in post-join projection
Key: SPARK-6380
URL: https://issues.apache.org/jira/browse/SPARK-6380
Project: Spark
Issue Type: Improvement
Components: SQL
Reporter: Reynold Xin
df1.join(df2, df1("key") === df2("key")).select("key")
It would be great to just resolve key to df1("key") in the case of inner joins.
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