Reynold Xin created SPARK-8241:
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Summary: string function: concat_ws
Key: SPARK-8241
URL: https://issues.apache.org/jira/browse/SPARK-8241
Project: Spark
Issue Type: Sub-task
Reporter: Reynold Xin
concat_ws(string SEP, string A, string B...): string
concat_ws(string SEP, array<string>): string
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