Multiple distinct function to support hive.groupby.skewindata optimization
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Key: HIVE-2416
URL: https://issues.apache.org/jira/browse/HIVE-2416
Project: Hive
Issue Type: Improvement
Reporter: Ted Xu
Assignee: Ted Xu
Currently when multiple distinct function is used, hive.groupby.skewindata
optimization parameter shall be set false, or else an exception is raised:
{code}
Error in semantic analysis: DISTINCT on different columns not supported with
skew in data
{code}
Skew groupby should support multiple distinct function
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