yanghua commented on a change in pull request #6576: [FLINK-10145][table] Add 
replace supported in TableAPI and SQL
URL: https://github.com/apache/flink/pull/6576#discussion_r211091915
 
 

 ##########
 File path: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/expressions/stringExpressions.scala
 ##########
 @@ -410,3 +410,27 @@ case class ToBase64(child: Expression) extends 
UnaryExpression with InputTypeSpe
   override def toString: String = s"($child).toBase64"
 
 }
+
+/**
+  * Returns the string `str` with all non-overlapping occurrences
 
 Review comment:
   remove all the  "``" , just describe the function

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