[HIVE-26327] Export failed when data writed by tez engine and has HIVE_UNION_SUBDIR directory

• Type: Bug
• Status: Open
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 3.1.0, 4.0.0-alpha-1
• Component/s: Import/Export
• Assignee: Unassigned
• Reporter: zhaolong
• Created: 14/Jun/22 11:44
• Updated: 14/Jun/22 11:44

Description

1. tez engine will write HIVE_UNION_SUBDIR when we use union all syntx.

2. when we export a big table （use distcp ） will has bellow error. because of distcp only copy the HIVE_UNION_SUBDIR child file and dir to data.  so 000000_0 file will has same name.