[IMPALA-11739] Skip pushing down BinaryPredicate with NullLiteral for Iceberg tables

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Labels: iceberg
• Target Version: Impala 4.3.0
• Epic Color: ghx-label-11
• Assignee: gaoxiaoqing
• Reporter: gaoxiaoqing
• Created: 23/Nov/22 06:35
• Updated: 03/Jan/24 10:53
• Resolved: 03/Jan/24 10:53

Description

Following query throws an Exception, "ERROR: ClassCastException: org.apache.impala.analysis.NullLiteral cannot be cast to org.apache.impala.analysis.StringLiteral"

select * from iceberg_alltypes_part where p_string!=NULL;

When hdfs table filtered not equal null or equal null, it is successful. It should keep same.