dilipbiswal commented on a change in pull request #28750:
URL: https://github.com/apache/spark/pull/28750#discussion_r436540551



##########
File path: 
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/StringUtils.scala
##########
@@ -122,8 +122,8 @@ object StringUtils extends Logging {
           val available = maxLength - length
           val stringToAppend = if (available >= sLen) s else s.substring(0, 
available)
           strings.append(stringToAppend)
+          length += sLen
         }
-        length += sLen

Review comment:
       @MaxGekk Yeah.. Sure. Just wondering we absolutely need to change the 
length in case we are not doing an append. The error message you are referring 
to, is this captured in some test ? I ran catalyst and sql tests and didn't see 
any failure. 




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