Github user viirya commented on a diff in the pull request:
https://github.com/apache/spark/pull/18046#discussion_r118838283
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -1153,15 +1153,17 @@ case class Substring(str: Expression, pos:
Expression, len: Expression)
}
/**
- * A function that return the length of the given string or binary
expression.
+ * A function that return the char length of the given string or binary
expression.
--- End diff --
... or number of bytes of binary expression.
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