Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/6762#discussion_r34216247
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringOperations.scala
---
@@ -188,6 +189,302 @@ case class EndsWith(left: Expression, right:
Expression)
}
/**
+ * A function that trim the spaces from both ends for the specified string.
+ */
+case class StringTrim(child: Expression)
+ extends UnaryExpression with String2StringExpression {
+
+ def convert(v: UTF8String): UTF8String = v.trim()
+
+ override def toString: String = s"TRIM($child)"
--- End diff --
`trim()` is little bit better than `stringtrim()`, I think.
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