[HIVE-205] file sink operator needs unique file names

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Duplicate
• Component/s: Query Processor
• Assignee: Unassigned
• Reporter: Zheng Shao
• Created: 05/Jan/09 08:06
• Updated: 11/Mar/09 00:27
• Resolved: 11/Mar/09 00:27

Description

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.

Issue Links

• duplicates: HIVE-318 [Hive] union all queries broken - all kinds of problems