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   * Licensed to the Apache Software Foundation (ASF) under one
   * or more contributor license agreements.  See the NOTICE file
   * distributed with this work for additional information
   * regarding copyright ownership.  The ASF licenses this file
   * to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance
   * with the License.  You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
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   * See the License for the specific language governing permissions and
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  package org.apache.cassandra.distributed.upgrade;
  
  import org.junit.Test;
  
  import static org.apache.cassandra.distributed.api.Feature.GOSSIP;
  import static org.apache.cassandra.distributed.api.Feature.NATIVE_PROTOCOL;
  import static org.apache.cassandra.distributed.api.Feature.NETWORK;
  import static org.apache.cassandra.distributed.shared.AssertUtils.assertRows;
  
  public class DropCompactStorageNullClusteringValuesTest extends UpgradeTestBase
  {
      public static final String TABLE_NAME = "cs_tbl";
  
      @Test
      public void testNullClusteringValues() throws Throwable
      {
          new TestCase().nodes(1)
                        .upgradesToCurrentFrom(OLDEST)
                        .withConfig(config -> config.with(GOSSIP, NETWORK, NATIVE_PROTOCOL).set("enable_drop_compact_storage", true))
                        .setup(cluster -> {
                            String create = "CREATE TABLE %s.%s(k int, c1 int, c2 int, v int, PRIMARY KEY (k, c1, c2)) " +
                                            "WITH compaction = { 'class':'LeveledCompactionStrategy', 'enabled':'false'} AND COMPACT STORAGE";
                            cluster.schemaChange(String.format(create, KEYSPACE, TABLE_NAME));
  
                            String insert = "INSERT INTO %s.%s(k, c1, v) values (?, ?, ?)";
                            cluster.get(1).executeInternal(String.format(insert, KEYSPACE, TABLE_NAME), 1, 1, 1);
                            cluster.get(1).flush(KEYSPACE);
  
                            cluster.get(1).executeInternal(String.format(insert, KEYSPACE, TABLE_NAME), 2, 2, 2);
                            cluster.get(1).flush(KEYSPACE);
  
                            cluster.schemaChange(String.format("ALTER TABLE %s.%s DROP COMPACT STORAGE", KEYSPACE, TABLE_NAME));
                        })
                        .runAfterNodeUpgrade((cluster, node) -> {
                            cluster.get(1).forceCompact(KEYSPACE, TABLE_NAME);
                            Object[][] actual = cluster.get(1).executeInternal(String.format("SELECT * FROM %s.%s", KEYSPACE, TABLE_NAME));
                            assertRows(actual, new Object[] {1, 1, null, 1}, new Object[] {2, 2, null, 2});
                        })
                        .run();
      }
  }
  