Github user srowen commented on a diff in the pull request:
https://github.com/apache/spark/pull/15513#discussion_r84867405
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/xml/xpath.scala
---
@@ -108,8 +140,16 @@ case class XPathLong(xml: Expression, path:
Expression) extends XPathExtract {
}
@ExpressionDescription(
- usage = "_FUNC_(xml, xpath) - Returns a float value that matches the
xpath expression",
- extended = "> SELECT _FUNC_('<a><b>1</b><b>2</b></a>','sum(a/b)');\n3.0")
+ usage = "_FUNC_(xml, xpath) - Returns a float value that matches the
XPath expression.",
+ extended = """
+ Arguments:
+ xml - a string expression that represents XML document.
--- End diff --
Likewise "an XML document"
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