content: /*
   * 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,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.cassandra.index.sai.cql;
  
  import org.assertj.core.api.Assertions;
  import org.junit.Test;
  
  import org.apache.cassandra.cql3.CQL3Type;
  import org.apache.cassandra.index.sai.SAITester;
  import org.apache.cassandra.index.sai.StorageAttachedIndex;
  import org.apache.cassandra.index.sai.utils.IndexTermType;
  import org.apache.cassandra.utils.AbstractTypeGenerators;
  
  import static org.apache.cassandra.utils.ByteBufferUtil.EMPTY_BYTE_BUFFER;
  import static org.quicktheories.QuickTheory.qt;
  
  /**
   * Tests that empty values are only indexed for literal indexes. See CASSANDRA-20313 for more details.
   */
  public class EmptyValuesTest extends SAITester
  {
      @Test
      public void testEmptyValues()
      {
          qt().forAll(AbstractTypeGenerators.primitiveTypeGen()).checkAssert(type -> {
              CQL3Type cql3Type = type.asCQL3Type();
              if (type.allowsEmpty() && StorageAttachedIndex.SUPPORTED_TYPES.contains(cql3Type))
                  testEmptyValues(cql3Type);
          });
      }
  
      private void testEmptyValues(CQL3Type type)
      {
          createTable(String.format("CREATE TABLE %%s (k int PRIMARY KEY, v %s)", type));
          execute("INSERT INTO %s (k, v) VALUES (0, ?)", EMPTY_BYTE_BUFFER);
          flush();
          createIndex(String.format(CREATE_INDEX_TEMPLATE, 'v'));
  
          IndexTermType termType = createIndexTermType(type.getType());
          boolean indexed = !termType.skipsEmptyValue();
  
          Assertions.assertThat(execute("SELECT * FROM %s WHERE v = ?", EMPTY_BYTE_BUFFER)).hasSize(indexed ? 1 : 0);
  
          execute("INSERT INTO %s (k, v) VALUES (1, ?)", EMPTY_BYTE_BUFFER);
  
          Assertions.assertThat(execute("SELECT * FROM %s WHERE v = ?", EMPTY_BYTE_BUFFER)).hasSize(indexed ? 2 : 0);
          flush();
          Assertions.assertThat(execute("SELECT * FROM %s WHERE v = ?", EMPTY_BYTE_BUFFER)).hasSize(indexed ? 2 : 0);
      }
  }