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From "Zheng Shao (JIRA)" <>
Subject [jira] Created: (HIVE-205) file sink operator needs unique file names
Date Mon, 05 Jan 2009 08:07:44 GMT
file sink operator needs unique file names

                 Key: HIVE-205
             Project: Hadoop Hive
          Issue Type: Bug
          Components: Query Processor
            Reporter: Zheng Shao

a query like "SELECT * FROM (SELECT 'a' from table UNION ALL SELECT 'b' from table) c" will
fail, because the 2 sub queries of "UNION" will be executed inside the same mapper (because
the input is the same) towards the same destination table, and the 2 file sink operators will
have the same output file name.

We need to append the file sink operator id to the file name to make it unique.

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