[jira] [Created] (SPARK-12480) add Hash expression that can calculate hash value for a group of expressions

[Wenchen Fan (JIRA)]

Wenchen Fan created SPARK-12480:
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             Summary: add Hash expression that can calculate hash value for a 
group of expressions
                 Key: SPARK-12480
                 URL: https://issues.apache.org/jira/browse/SPARK-12480
             Project: Spark
          Issue Type: New Feature
          Components: SQL
            Reporter: Wenchen Fan






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