[KYLIN-4540] Some field values will become null after UNION ALL

• Type: Bug
• Status: In Progress
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: v3.0.2
• Fix Version/s: Future
• Component/s: Query Engine
• Assignee: Yaqian Zhang
• Reporter: Yaqian Zhang
• Created: 01/Jun/20 03:35
• Updated: 04/Sep/20 07:00

Description

It can be reproduced in learn_kylin.
see: https://lists.apache.org/thread.html/r5b17ec62b08dbfb82e1db597e957a51ace210d95a6e1ba2b217496df%40%3Cuser.kylin.apache.org%3E