add test

Author: WeichenXu123

sql/core/src/test/scala/org/apache/spark/sql/execution/command/DDLParserSuite.scala

@@ -184,6 +184,15 @@ class DDLParserSuite extends AnalysisTest with SharedSQLContext {
       containsThesePhrases = Seq("key_without_value"))
   }
 
+  test("alter database set location") {
+    // ALTER (DATABASE|SCHEMA) database_name SET LOCATION
+    val sql1 = "ALTER DATABASE database_name SET LOCATION '/home/user/db'"
+    val parsed1 = parser.parsePlan(sql1)
+
+    val expected1 = AlterDatabaseLocationCommand("database_name", "/home/user/db")
+    comparePlans(parsed1, expected1)
+  }
+
   test("describe database") {
     // DESCRIBE DATABASE [EXTENDED] db_name;
     val sql1 = "DESCRIBE DATABASE EXTENDED db_name"