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Posted to dev@hive.apache.org by "Pengcheng Xiong (JIRA)" <ji...@apache.org> on 2016/01/15 23:23:39 UTC

[jira] [Created] (HIVE-12882) Automatically choose to use noscan for stats collection

Pengcheng Xiong created HIVE-12882:
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             Summary: Automatically choose to use noscan for stats collection
                 Key: HIVE-12882
                 URL: https://issues.apache.org/jira/browse/HIVE-12882
             Project: Hive
          Issue Type: Sub-task
            Reporter: Pengcheng Xiong


noscan is leveraging the file system to derive the #rows and rawDataSize. According to [~ashutoshc], it now only works with RC and ORC file type. We would like Hive to automatically choose to use noscan or scan based on the file system when stats task starts or when user issues the same query "Analyze ...."



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