HHH-15342 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/notfound/HqlExplicitLeftJoinTest.java

@@ -0,0 +1,143 @@
+package org.hibernate.orm.test.notfound;
+
+import org.hibernate.annotations.NotFound;
+import org.hibernate.annotations.NotFoundAction;
+import org.hibernate.sql.ast.SqlAstJoinType;
+
+import org.hibernate.testing.TestForIssue;
+import org.hibernate.testing.jdbc.SQLStatementInspector;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+
+@DomainModel(
+		annotatedClasses = { HqlExplicitLeftJoinTest.EntityA.class, HqlExplicitLeftJoinTest.EntityB.class }
+)
+@SessionFactory(
+		statementInspectorClass = SQLStatementInspector.class
+)
+@TestForIssue( jiraKey = "HHH-15342")
+public class HqlExplicitLeftJoinTest {
+
+	@Test
+	public void testExplicitLeftJoin(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					session.createQuery(
+									"Select a From EntityA a " +
+											"Left Join a.entityB b " +
+											"Where ( b.id IS NOT NULL )" )
+							.getResultList();
+					// The SQL should contain only the LEFT JOIN ( not inner join for the #@NotFound )
+					sqlStatementInterceptor.assertNumberOfJoins( 0, 1 );
+
+					sqlStatementInterceptor.assertNumberOfJoins( 0, SqlAstJoinType.LEFT, 1 );
+				}
+		);
+	}
+
+	@Test
+	public void testExplicitLeftJoin2(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					session.createQuery(
+									"Select a From EntityA a " +
+											"Left Join a.entityB b " +
+											"Where ( b.name IS NOT NULL )" )
+							.getResultList();
+					// The SQL should contain only the LEFT JOIN ( not inner join for the #@NotFound )
+					sqlStatementInterceptor.assertNumberOfJoins( 0, 1 );
+
+					sqlStatementInterceptor.assertNumberOfJoins( 0, SqlAstJoinType.LEFT, 1 );
+				}
+		);
+	}
+
+	@Test
+	public void testImplicitJoin(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					session.createQuery(
+									"Select a From EntityA a " +
+											"Left Join a.entityB b " +
+											"Join a.entityB " +
+											"Where ( a.entityB.name IS NOT NULL )" )
+							.getResultList();
+					// The SQL should contain only the INNER JOIN ( The LEFT one will not be rendered due to optimizations )
+					sqlStatementInterceptor.assertNumberOfJoins( 0, 1 );
+
+					sqlStatementInterceptor.assertNumberOfJoins( 0, SqlAstJoinType.LEFT, 0 );
+				}
+		);
+	}
+
+	@Test
+	public void testImplicitJoin2(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					session.createQuery(
+									"Select a From EntityA a " +
+											"Join a.entityB " +
+											"Where ( a.entityB.name IS NOT NULL )" )
+							.getResultList();
+					// The SQL should contain only one INNER JOIN
+					sqlStatementInterceptor.assertNumberOfJoins( 0, 1 );
+
+					sqlStatementInterceptor.assertNumberOfJoins( 0, SqlAstJoinType.LEFT, 0 );
+				}
+		);
+	}
+
+	@Test
+	public void testImplicitJoinWithNoExplicitJoins(SessionFactoryScope scope) {
+		final SQLStatementInspector sqlStatementInterceptor = (SQLStatementInspector) scope.getStatementInspector();
+		sqlStatementInterceptor.clear();
+		scope.inTransaction(
+				session -> {
+					session.createQuery(
+									"Select a From EntityA a " +
+											"Where ( a.entityB.name IS NOT NULL )" )
+							.getResultList();
+					// The SQL should contain only one INNER JOIN
+					sqlStatementInterceptor.assertNumberOfJoins( 0, 1 );
+
+					sqlStatementInterceptor.assertNumberOfJoins( 0, SqlAstJoinType.LEFT, 0 );
+				}
+		);
+	}
+
+	@Entity(name = "EntityA")
+	public static class EntityA {
+		@Id
+		private Integer id;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		@NotFound(action = NotFoundAction.IGNORE)
+		private EntityB entityB;
+
+	}
+
+	@Entity(name = "EntityB")
+	public static class EntityB {
+		@Id
+		private Integer id;
+
+		private String name;
+
+	}
+
+}