[KYLIN-4791] Throws exception 'UnsupportedOperationException: empty.reduceLeft' when there are cast expressions in the filters of FilePruner

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: v4.0.0-alpha
• Fix Version/s: v4.0.0-beta
• Component/s: Query Engine, Spark Engine
• Assignee: Zhichao Zhang
• Reporter: Zhichao Zhang
• Created: 19/Oct/20 08:02
• Updated: 13/Nov/20 02:29
• Resolved: 13/Nov/20 02:29

Description

When execute function 'pruneSegments' of FilePruner, if there are some cast expressions in filter, it will throw exception 'UnsupportedOperationException: empty.reduceLeft'.

 

Solution:

Convert cast expressions in filter to attribute before translating filter.