LiBinfeng-01 commented on code in PR #49087:
URL: https://github.com/apache/doris/pull/49087#discussion_r2000437253


##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/executable/StringArithmetic.java:
##########
@@ -303,17 +308,19 @@ public static Expression left(StringLikeLiteral first, 
IntegerLiteral second) {
      */
     @ExecFunction(name = "right")
     public static Expression right(StringLikeLiteral first, IntegerLiteral 
second) {
-        if (second.getValue() < (- first.getValue().length()) || 
Math.abs(second.getValue()) == 0) {
+        int inputLength = first.getValue().offsetByCodePoints(0, 
first.getValue().length());
+        if (second.getValue() < (- inputLength) || Math.abs(second.getValue()) 
== 0) {
             return castStringLikeLiteral(first, "");
-        } else if (second.getValue() > first.getValue().length()) {
+        } else if (second.getValue() > inputLength) {

Review Comment:
   done



##########
fe/fe-core/src/main/java/org/apache/doris/nereids/trees/expressions/functions/executable/StringArithmetic.java:
##########
@@ -289,12 +292,14 @@ public static Expression replace(StringLikeLiteral first, 
StringLikeLiteral seco
      */
     @ExecFunction(name = "left")
     public static Expression left(StringLikeLiteral first, IntegerLiteral 
second) {
+        int inputLength = first.getValue().offsetByCodePoints(0, 
first.getValue().length());
         if (second.getValue() <= 0) {
             return castStringLikeLiteral(first, "");
-        } else if (second.getValue() < first.getValue().length()) {
-            return castStringLikeLiteral(first, first.getValue().substring(0, 
second.getValue()));
-        } else {
+        } else if (second.getValue() > inputLength) {

Review Comment:
   done



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