HHH-18353 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/function/array/ArrayConstructorInSelectClauseTest.java

@@ -0,0 +1,144 @@
+package org.hibernate.orm.test.function.array;
+
+import java.util.Arrays;
+
+import org.hibernate.dialect.OracleDialect;
+
+import org.hibernate.testing.jdbc.SharedDriverManagerTypeCacheClearingIntegrator;
+import org.hibernate.testing.orm.junit.BootstrapServiceRegistry;
+import org.hibernate.testing.orm.junit.DialectFeatureChecks;
+import org.hibernate.testing.orm.junit.DomainModel;
+import org.hibernate.testing.orm.junit.Jira;
+import org.hibernate.testing.orm.junit.RequiresDialectFeature;
+import org.hibernate.testing.orm.junit.SessionFactory;
+import org.hibernate.testing.orm.junit.SessionFactoryScope;
+import org.junit.jupiter.api.AfterEach;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+
+import static org.assertj.core.api.AssertionsForClassTypes.assertThat;
+
+@DomainModel(
+		annotatedClasses = {
+				ArrayConstructorInSelectClauseTest.Book.class,
+				ArrayConstructorInSelectClauseTest.Author.class
+		})
+@SessionFactory
+@RequiresDialectFeature(feature = DialectFeatureChecks.SupportsStructuralArrays.class)
+// Clear the type cache, otherwise we might run into ORA-21700: object does not exist or is marked for delete
+@BootstrapServiceRegistry(integrators = SharedDriverManagerTypeCacheClearingIntegrator.class)
+public class ArrayConstructorInSelectClauseTest {
+	private static final Long AUTHOR_ID = 1l;
+	private static final Long CO_AUTHOR_ID = 2l;
+	private static final Long BOOK_ID = 3l;
+
+	@BeforeEach
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					var dialect = session.getDialect();
+					if ( dialect instanceof OracleDialect ) {
+						session.createNativeQuery(
+										"create or replace type LongArray as varying array(127) of number(19,0)" )
+								.executeUpdate();
+					}
+					var author = new Author( AUTHOR_ID, "D Thomas" );
+					var coAuthor = new Author( CO_AUTHOR_ID, "A Hunt" );
+					session.persist( author );
+					session.persist( coAuthor );
+
+					var book = new Book( BOOK_ID, "The Pragmatic Programmer", author, coAuthor );
+					session.persist( book );
+				}
+		);
+	}
+
+	@AfterEach
+	public void tearDown(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					session.createMutationQuery( "delete from Book" ).executeUpdate();
+					session.createMutationQuery( "delete from Author" ).executeUpdate();
+					var dialect = session.getDialect();
+					if ( dialect instanceof OracleDialect ) {
+						session.createNativeQuery( "drop type LongArray" ).executeUpdate();
+					}
+				}
+		);
+	}
+
+	@Test
+	@Jira("HHH-18353")
+	public void testArraySelectionNoCast(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					var query = session.createQuery(
+							"SELECT ARRAY(b.author.id, b.coAuthor.id) FROM Book b WHERE b.id = :bookId",
+							Long[].class
+					).setParameter( "bookId", BOOK_ID );
+
+					assertThat( query.getSingleResult() ).containsAll( Arrays.asList( AUTHOR_ID, CO_AUTHOR_ID ) );
+				}
+		);
+	}
+
+	@Test
+	public void testArraySelectionCast(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					var query = session.createQuery(
+							"SELECT ARRAY(CAST(b.author.id as Long), CAST(b.coAuthor.id as Long)) FROM Book b WHERE b.id = :bookId",
+							Long[].class
+					).setParameter( "bookId", BOOK_ID );
+
+					assertThat( query.getSingleResult() ).containsAll( Arrays.asList( AUTHOR_ID, CO_AUTHOR_ID ) );
+				}
+		);
+	}
+
+	@Entity(name = "Author")
+	public static class Author {
+
+		@Id
+		private Long id;
+
+		private String name;
+
+		public Author() {
+		}
+
+		public Author(Long id, String name) {
+			this.id = id;
+			this.name = name;
+		}
+	}
+
+	@Entity(name = "Book")
+	public static class Book {
+
+		@Id
+		private Long id;
+
+		private String title;
+
+		@ManyToOne
+		private Author author;
+
+		@ManyToOne
+		private Author coAuthor;
+
+		public Book() {
+		}
+
+		public Book(long id, String title, Author author, Author coAuthor) {
+			this.id = id;
+			this.title = title;
+			this.author = author;
+			this.coAuthor = coAuthor;
+		}
+	}
+}