Github user dongjoon-hyun commented on a diff in the pull request:
https://github.com/apache/spark/pull/14008#discussion_r69260667
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -653,6 +655,128 @@ case class StringRPad(str: Expression, len:
Expression, pad: Expression)
}
/**
+ * Extracts a part from a URL
+ */
+@ExpressionDescription(
+ usage = "_FUNC_(url, partToExtract[, key]) - extracts a part from a URL",
+ extended = "Parts: HOST, PATH, QUERY, REF, PROTOCOL, AUTHORITY, FILE,
USERINFO\n"
+ + "key specifies which query to extract\n"
--- End diff --
Hi, @janplus .
There is a limitation of Scala 2.10 compiler. For `extended`, "+" breaks
build.
Please use one single `""" """` string like SubstringIndex
https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala#L498
.
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