Merge pull request #18819 from azhwani/BAEL-9408

BAEL-9408: Resolving Hibernate SyntaxException: token '*', no viable alternative

Author: xaeldung

persistence-modules/hibernate-exceptions-2/src/main/java/com/baeldung/hibernate/syntaxexception/HibernateUtil.java

@@ -0,0 +1,39 @@
+package com.baeldung.hibernate.syntaxexception;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.hibernate.SessionFactory;
+import org.hibernate.boot.Metadata;
+import org.hibernate.boot.MetadataSources;
+import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
+import org.hibernate.service.ServiceRegistry;
+
+public class HibernateUtil {
+    private static SessionFactory sessionFactory;
+
+    public static SessionFactory getSessionFactory() {
+        if (sessionFactory == null) {
+            Map<String, Object> settings = new HashMap<>();
+            settings.put("hibernate.connection.driver_class", "org.h2.Driver");
+            settings.put("hibernate.connection.url", "jdbc:h2:mem:test");
+            settings.put("hibernate.connection.username", "sa");
+            settings.put("hibernate.connection.password", "");
+            settings.put("hibernate.dialect", "org.hibernate.dialect.H2Dialect");
+            settings.put("hibernate.show_sql", "true");
+            settings.put("hibernate.hbm2ddl.auto", "update");
+
+            ServiceRegistry standardRegistry = new StandardServiceRegistryBuilder().applySettings(settings)
+                .build();
+
+            Metadata metadata = new MetadataSources(standardRegistry).addAnnotatedClass(Person.class)
+                .getMetadataBuilder()
+                .build();
+
+            sessionFactory = metadata.getSessionFactoryBuilder()
+                .build();
+        }
+
+        return sessionFactory;
+    }
+}

persistence-modules/hibernate-exceptions-2/src/main/java/com/baeldung/hibernate/syntaxexception/Person.java

@@ -0,0 +1,23 @@
+package com.baeldung.hibernate.syntaxexception;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+
+@Entity
+public class Person {
+
+    @Id
+    private int id;
+    private String firstName;
+    private String lastName;
+    
+    public Person() {
+    }
+    
+    public Person(int id, String firstName, String lastName) {
+        this.id = id;
+        this.firstName = firstName;
+        this.lastName = lastName;
+    }
+    
+}

persistence-modules/hibernate-exceptions-2/src/test/java/com/baeldung/hibernate/syntaxexception/SyntaxExceptionUnitTest.java

@@ -0,0 +1,49 @@
+package com.baeldung.hibernate.syntaxexception;
+
+import static org.assertj.core.api.Assertions.assertThat;
+import static org.assertj.core.api.Assertions.assertThatThrownBy;
+
+import java.util.List;
+
+import org.hibernate.Session;
+import org.hibernate.query.SyntaxException;
+import org.junit.jupiter.api.AfterAll;
+import org.junit.jupiter.api.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+class SyntaxExceptionUnitTest {
+
+    private static Session session;
+
+    @BeforeAll
+    static void beforeAll() {
+        session = HibernateUtil.getSessionFactory()
+            .openSession();
+        session.beginTransaction();
+    }
+
+    @AfterAll
+    static void afterAll() {
+        session.close();
+    }
+
+    @Test
+    void whenUsingInvalidHQLSyntax_thenThrowSyntaxException() {
+        assertThatThrownBy(() -> {
+            session.createQuery("SELECT * FROM Person p", Person.class)
+                .list();
+        }).hasRootCauseInstanceOf(SyntaxException.class)
+            .hasMessageContaining("token '*', no viable alternative");
+    }
+
+    @Test
+    void whenUsingValidHQLSyntax_thenCorrect() {
+        Person person = new Person(1, "Jane", "Austen");
+        session.persist(person);
+        
+        List<Person> personList = session.createQuery("SELECT p FROM Person p", Person.class).list();
+        
+        assertThat(personList).contains(person);
+    }
+
+}