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https://issues.apache.org/jira/browse/HIVE-164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zheng Shao updated HIVE-164:
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Attachment: (was: HIVE-164.2.patch)
> Support CASE and IF statement
> -----------------------------
>
> Key: HIVE-164
> URL: https://issues.apache.org/jira/browse/HIVE-164
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Zheng Shao
> Assignee: Zheng Shao
>
> See http://dev.mysql.com/doc/refman/5.0/en/control-flow-functions.html for
> details.
> Syntax:
> {code}
> CASE value WHEN [compare_value] THEN result [WHEN [compare_value] THEN result
> ...] [<ELSE result] END
> CASE WHEN [condition] THEN result [WHEN [condition] THEN result ...] [ELSE
> result] END
> IF(expr1,expr2,expr3)
> {code}
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