[GitHub] [spark] srowen commented on a change in pull request #30905: [SPARK-33890][SQL] Improve the implement of trim/trimleft/trimright

[GitBox <gi...@apache.org>]

srowen commented on a change in pull request #30905:
URL: https://github.com/apache/spark/pull/30905#discussion_r549362820



##########
File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
##########
@@ -756,6 +756,54 @@ trait String2TrimExpression extends Expression with ImplicitCastInputTypes {
   override def nullable: Boolean = children.exists(_.nullable)
   override def foldable: Boolean = children.forall(_.foldable)
 
+  protected def doEval(srcString: UTF8String): Any

Review comment:
       These will definitely return UTF8String right?




----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users@infra.apache.org



---------------------------------------------------------------------
To unsubscribe, e-mail: reviews-unsubscribe@spark.apache.org
For additional commands, e-mail: reviews-help@spark.apache.org