fix failing tests

- remove 'replace columns' unsupported test
- fix 'add columns' unsupported operations tests to match refactored exceptions messages

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

@@ -840,14 +840,6 @@ class DDLParserSuite extends AnalysisTest with SharedSQLContext {
     assertUnsupported("ALTER TABLE table_name SKEWED BY (key) ON (1,5,6) STORED AS DIRECTORIES")
   }
 
-  test("alter table: replace columns (not allowed)") {
-    assertUnsupported(
-      """
-       |ALTER TABLE table_name REPLACE COLUMNS (new_col1 INT
-       |COMMENT 'test_comment', new_col2 LONG COMMENT 'test_comment2') RESTRICT
-      """.stripMargin)
-  }
-
   test("show databases") {
     val sql1 = "SHOW DATABASES"
     val sql2 = "SHOW DATABASES LIKE 'defau*'"

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

@@ -2589,7 +2589,7 @@ abstract class DDLSuite extends QueryTest with SQLTestUtils {
       val e = intercept[AnalysisException] {
         sql("ALTER TABLE t1 ADD COLUMNS (c2 int)")
       }.getMessage
-      assert(e.contains("ALTER ADD COLUMNS does not support datasource table with type"))
+      assert(e.contains("ALTER [ADD|REPLACE] COLUMNS do not support datasource table with type"))
     }
   }
 
@@ -2599,7 +2599,7 @@ abstract class DDLSuite extends QueryTest with SQLTestUtils {
       val e = intercept[AnalysisException] {
         sql("ALTER TABLE tmp_v ADD COLUMNS (c3 INT)")
       }
-      assert(e.message.contains("ALTER ADD COLUMNS does not support views"))
+      assert(e.message.contains("ALTER [ADD|REPLACE] COLUMNS do not support views"))
     }
   }
 
@@ -2609,7 +2609,7 @@ abstract class DDLSuite extends QueryTest with SQLTestUtils {
       val e = intercept[AnalysisException] {
         sql("ALTER TABLE v1 ADD COLUMNS (c3 INT)")
       }
-      assert(e.message.contains("ALTER ADD COLUMNS does not support views"))
+      assert(e.message.contains("ALTER [ADD|REPLACE] COLUMNS do not support views"))
     }
   }