projjal commented on a change in pull request #12440:
URL: https://github.com/apache/arrow/pull/12440#discussion_r818342766



##########
File path: cpp/src/gandiva/precompiled/string_ops.cc
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@@ -2207,6 +2213,12 @@ const char* right_utf8_int32(gdv_int64 context, const 
char* text, gdv_int32 text
     return "";
   }
 
+  //case where right('abcdef', -6) -> "" and right('abcdef', -7) -> ""
+  if(number < 0 && abs(number) >= text_len) {

Review comment:
       This is not handling mutibyte unicode characters 




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