morrySnow commented on code in PR #44064:
URL: https://github.com/apache/doris/pull/44064#discussion_r1844987562


##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/visitor/ExpressionColumnFilterConverter.java:
##########
@@ -115,7 +115,7 @@ public Expression visitIsNull(IsNull predicate, Void 
unused) {
     }
 
     private void setOrUpdateFilter(String columnName) {
-        PartitionColumnFilter filter = 
columnFilterMap.computeIfAbsent(columnName,
+        PartitionColumnFilter filter = 
columnFilterMap.computeIfAbsent(columnName.toUpperCase(),

Review Comment:
   let these map's key case insensitive is better way



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