Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/14008#discussion_r69893790
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/stringExpressions.scala
---
@@ -652,6 +654,145 @@ case class StringRPad(str: Expression, len:
Expression, pad: Expression)
override def prettyName: String = "rpad"
}
+object ParseUrl {
+ private val HOST = UTF8String.fromString("HOST")
+ private val PATH = UTF8String.fromString("PATH")
+ private val QUERY = UTF8String.fromString("QUERY")
+ private val REF = UTF8String.fromString("REF")
+ private val PROTOCOL = UTF8String.fromString("PROTOCOL")
+ private val FILE = UTF8String.fromString("FILE")
+ private val AUTHORITY = UTF8String.fromString("AUTHORITY")
+ private val USERINFO = UTF8String.fromString("USERINFO")
+ private val REGEXPREFIX = "(&|^)"
+ private val REGEXSUBFIX = "=([^&]*)"
+}
+
+/**
+ * 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.
+ Key specifies which query to extract.
+ Examples:
+ > SELECT _FUNC_('http://spark.apache.org/path?query=1', 'HOST')
+ 'spark.apache.org'
+ > SELECT _FUNC_('http://spark.apache.org/path?query=1', 'QUERY')
+ 'query=1'
+ > SELECT _FUNC_('http://spark.apache.org/path?query=1', 'QUERY',
'query')
+ '1'""")
+case class ParseUrl(children: Seq[Expression])
+ extends Expression with ImplicitCastInputTypes with CodegenFallback {
+
+ override def nullable: Boolean = true
+ override def inputTypes: Seq[DataType] =
Seq.fill(children.size)(StringType)
+ override def dataType: DataType = StringType
+ override def prettyName: String = "parse_url"
+
+ // If the url is a constant, cache the URL object so that we don't need
to convert url
+ // from UTF8String to String to URL for every row.
+ @transient private lazy val cachedUrl = children(0) match {
+ case Literal(url: UTF8String, _) => getUrl(url)
+ case _ => null
+ }
+
+ // If the key is a constant, cache the Pattern object so that we don't
need to convert key
+ // from UTF8String to String to StringBuilder to String to Pattern for
every row.
+ @transient private lazy val cachedPattern = children(2) match {
+ case Literal(key: UTF8String, _) => getPattern(key)
--- End diff --
can you also try scala 2.10? It's also an officially supported scala
version for spark.
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