fix style

Author: cloud-fan

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/unresolved.scala

@@ -49,8 +49,12 @@ case class UnresolvedRelation(
 /**
  * Holds the name of an attribute that has yet to be resolved.
  */
-case class UnresolvedAttribute(nameParts: Seq[String]) extends Attribute with trees.LeafNode[Expression] {
-  def name = nameParts.map(n => if (n.contains(".")) s"`$n`" else n).mkString(".")
+case class UnresolvedAttribute(nameParts: Seq[String])
+  extends Attribute with trees.LeafNode[Expression] {
+
+  def name: String =
+    nameParts.map(n => if (n.contains(".")) s"`$n`" else n).mkString(".")
+
   override def exprId: ExprId = throw new UnresolvedException(this, "exprId")
   override def dataType: DataType = throw new UnresolvedException(this, "dataType")
   override def nullable: Boolean = throw new UnresolvedException(this, "nullable")
@@ -70,8 +74,8 @@ case class UnresolvedAttribute(nameParts: Seq[String]) extends Attribute with tr
 }
 
 object UnresolvedAttribute {
-  def apply(name: String) = new UnresolvedAttribute(name.split("\\."))
-  def quoted(name: String) = new UnresolvedAttribute(Seq(name))
+  def apply(name: String): UnresolvedAttribute = new UnresolvedAttribute(name.split("\\."))
+  def quoted(name: String): UnresolvedAttribute = new UnresolvedAttribute(Seq(name))
 }
 
 case class UnresolvedFunction(name: String, children: Seq[Expression]) extends Expression {

sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala

@@ -1223,7 +1223,8 @@ class SQLQuerySuite extends QueryTest with BeforeAndAfterAll {
 
   test("SPARK-6898: complete support for special chars in column names") {
     jsonRDD(sparkContext.makeRDD(
-      """{"a": {"c.b": 1}, "b.$q": [{"a@!.q": 1}], "q.w": {"w.i&": [1]}}""" :: Nil)).registerTempTable("t")
+      """{"a": {"c.b": 1}, "b.$q": [{"a@!.q": 1}], "q.w": {"w.i&": [1]}}""" :: Nil))
+      .registerTempTable("t")
 
     checkAnswer(sql("SELECT a.`c.b`, `b.$q`[0].`a@!.q`, `q.w`.`w.i&`[0] FROM t"), Row(1, 1, 1))
   }