content: /*
   * Copyright (c) 2002, 2020, Oracle and/or its affiliates.
   *
   * This program is free software; you can redistribute it and/or modify it under
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   * Free Software Foundation.
   *
   * This program is also distributed with certain software (including but not
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   * Without limiting anything contained in the foregoing, this file, which is
   * part of MySQL Connector/J, is also subject to the Universal FOSS Exception,
   * version 1.0, a copy of which can be found at
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   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
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   * FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
   * for more details.
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   * You should have received a copy of the GNU General Public License along with
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   */
  
  package testsuite.regression;
  
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.junit.jupiter.api.BeforeEach;
  import org.junit.jupiter.api.Test;
  
  import testsuite.BaseTestCase;
  
  /**
   * Tests SubQueries
   */
  public class SubqueriesRegressionTest extends BaseTestCase {
      private final static int REPETITIONS = 100;
  
      @BeforeEach
      public void setUp() throws Exception {
          createTables();
      }
  
      @Test
      public void testSubQuery1() throws Exception {
          for (int i = 0; i < REPETITIONS; i++) {
  
              this.rs = this.stmt.executeQuery(
                      "select t3.colA from t3, t1 where t3.colA = 'bbbb' and t3.colB = t1.colA and exists (select 'X' from t2 where t2.colB = t1.colB)");
              assertTrue(this.rs.next());
              assertTrue("bbbb".equals(this.rs.getString(1)));
              assertTrue(!this.rs.next());
          }
      }
  
      @Test
      public void testSubQuery2() throws Exception {
          for (int i = 0; i < REPETITIONS; i++) {
  
              this.rs = this.stmt
                      .executeQuery("select t3.colA from t3, t1 where t3.colA = 'bbbb' and t3.colB = t1.colA and exists (select 'X' from t2 where t2.colB = 2)");
              assertTrue(this.rs.next());
              assertTrue("bbbb".equals(this.rs.getString(1)));
              assertTrue(!this.rs.next());
          }
      }
  
      @Test
      public void testSubQuery3() throws Exception {
          for (int i = 0; i < REPETITIONS; i++) {
  
              this.rs = this.stmt.executeQuery("select * from t1 where t1.colA = 'efgh' and exists (select 'X' from t2 where t2.colB = t1.colB)");
              assertTrue(this.rs.next());
              assertTrue("efgh".equals(this.rs.getString(1)));
              assertTrue("2".equals(this.rs.getString(2)));
              assertTrue(!this.rs.next());
          }
      }
  
      @Test
      public void testSubQuery4() throws Exception {
          // not really a subquery, but we want to have this in our testsuite
          for (int i = 0; i < REPETITIONS; i++) {
              this.rs = this.stmt.executeQuery("select colA, '' from t2 union select colA, colB from t3");
  
              assertTrue(this.rs.next());
              assertTrue("type1".equals(this.rs.getString(1)));
              assertTrue("".equals(this.rs.getString(2)));
  
              assertTrue(this.rs.next());
              assertTrue("type2".equals(this.rs.getString(1)));
              assertTrue("".equals(this.rs.getString(2)));
  
              assertTrue(this.rs.next());
              assertTrue("type3".equals(this.rs.getString(1)));
              assertTrue("".equals(this.rs.getString(2)));
  
              assertTrue(this.rs.next());
              assertTrue("aaaa".equals(this.rs.getString(1)));
              assertTrue("abcd".equals(this.rs.getString(2)), "'" + this.rs.getString(2) + "' != expected of 'abcd'");
  
              assertTrue(this.rs.next());
              assertTrue("bbbb".equals(this.rs.getString(1)));
              assertTrue("efgh".equals(this.rs.getString(2)));
  
              assertTrue(this.rs.next());
              assertTrue("cccc".equals(this.rs.getString(1)));
              assertTrue("ijkl".equals(this.rs.getString(2)), "'" + this.rs.getString(2) + "' != expected of 'ijkl'");
  
              assertTrue(!this.rs.next());
          }
      }
  
      @Test
      public void testSubQuery5() throws Exception {
          for (int i = 0; i < REPETITIONS; i++) {
  
              this.rs = this.stmt.executeQuery("select t1.colA from t1, t4 where t4.colA = t1.colA and exists (select 'X' from t2 where t2.colA = t4.colB)");
              assertTrue(this.rs.next());
              assertTrue("abcd".equals(this.rs.getString(1)));
              assertTrue(this.rs.next());
              assertTrue("efgh".equals(this.rs.getString(1)));
              assertTrue(this.rs.next());
              assertTrue("ijkl".equals(this.rs.getString(1)));
              assertTrue(!this.rs.next());
  
          }
      }
  
      private void createTables() throws Exception {
          createTable("t1", "(colA varchar(10), colB decimal(3,0))");
          createTable("t2", "(colA varchar(10), colB varchar(10))");
          createTable("t3", "(colA varchar(10), colB varchar(10))");
          createTable("t4", "(colA varchar(10), colB varchar(10))");
          this.stmt.executeUpdate("insert into t1 values ('abcd', 1), ('efgh', 2), ('ijkl', 3)");
          this.stmt.executeUpdate("insert into t2 values ('type1', '1'), ('type2', '2'), ('type3', '3')");
          this.stmt.executeUpdate("insert into t3 values ('aaaa', 'abcd'), ('bbbb', 'efgh'), ('cccc', 'ijkl')");
          this.stmt.executeUpdate("insert into t4 values ('abcd', 'type1'), ('efgh', 'type2'), ('ijkl', 'type3')");
      }
  }
  