Github user rdblue commented on a diff in the pull request:
https://github.com/apache/spark/pull/20495#discussion_r166358420
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -1655,15 +1655,17 @@ case class Left(str: Expression, len: Expression,
child: Expression) extends Run
*/
// scalastyle:off line.size.limit
@ExpressionDescription(
- usage = "_FUNC_(expr) - Returns the character length of `expr` or number
of bytes in binary data.",
+ usage = "_FUNC_(expr) - Returns the character length of `expr` or number
of bytes in binary data. " +
--- End diff --
+1 for string data / binary data
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