address comments

Author: imback82

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/plans/logical/statements.scala

@@ -340,7 +340,7 @@ case class CacheTableStatement(
     options: Map[String, String]) extends ParsedStatement
 
 /**
- * A UNCACHE TABLE statement, as parsed from SQL
+ * An UNCACHE TABLE statement, as parsed from SQL
  */
 case class UncacheTableStatement(
     tableName: Seq[String],

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/parser/DDLParserSuite.scala

@@ -1039,13 +1039,13 @@ class DDLParserSuite extends AnalysisTest {
       "missing 'COLUMNS' at '<EOF>'")
   }
 
-  test("MSCK REPAIR table") {
+  test("MSCK REPAIR TABLE") {
     comparePlans(
       parsePlan("MSCK REPAIR TABLE a.b.c"),
       RepairTableStatement(Seq("a", "b", "c")))
   }
 
-  test("CACHE table") {
+  test("CACHE TABLE") {
     comparePlans(
       parsePlan("CACHE TABLE a.b.c"),
       CacheTableStatement(Seq("a", "b", "c"), None, false, Map.empty))
@@ -1062,7 +1062,7 @@ class DDLParserSuite extends AnalysisTest {
       "It is not allowed to add catalog/namespace prefix a.b")
   }
 
-  test("UNCACHE TABLE table") {
+  test("UNCACHE TABLE") {
     comparePlans(
       parsePlan("UNCACHE TABLE a.b.c"),
       UncacheTableStatement(Seq("a", "b", "c"), ifExists = false))
@@ -1108,7 +1108,7 @@ class DDLParserSuite extends AnalysisTest {
     comparePlans(parsed5, expected5)
   }
 
-  test("REFRESH TABLE table") {
+  test("REFRESH TABLE") {
     comparePlans(
       parsePlan("REFRESH TABLE a.b.c"),
       RefreshTableStatement(Seq("a", "b", "c")))