HHH-15731 Add test for issue

hibernate-core/src/test/java/org/hibernate/orm/test/hql/NestedSubqueryTest.java

@@ -0,0 +1,213 @@
+package org.hibernate.orm.test.hql;
+
+import java.util.List;
+
+import org.hibernate.testing.TestForIssue;
+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.BeforeAll;
+import org.junit.jupiter.api.Test;
+
+import jakarta.persistence.Entity;
+import jakarta.persistence.FetchType;
+import jakarta.persistence.Id;
+import jakarta.persistence.ManyToOne;
+import jakarta.persistence.Table;
+import jakarta.persistence.Tuple;
+
+@DomainModel(
+		annotatedClasses = {
+				NestedSubqueryTest.Post.class,
+				NestedSubqueryTest.PostComment.class
+		}
+)
+@SessionFactory
+@TestForIssue(jiraKey = "HHH-15731")
+public class NestedSubqueryTest {
+
+	@BeforeAll
+	public void setUp(SessionFactoryScope scope) {
+		scope.inTransaction(
+				session -> {
+					short[] latestSQLStandards = {
+							2016,
+							2011,
+							2008
+					};
+
+					String[] comments = {
+							"great",
+							"excellent",
+							"awesome"
+					};
+
+					int post_id = 1;
+					int comment_id = 1;
+
+					for ( int i = 0; i < latestSQLStandards.length; i++ ) {
+						short sqlStandard = latestSQLStandards[i];
+						Post post = new Post()
+								.setId( post_id++ )
+								.setTitle( String.format( "SQL:%d", sqlStandard ) );
+
+						session.persist( post );
+
+						for ( int j = 0; j < comments.length - i; j++ ) {
+							session.persist(
+									new PostComment()
+											.setId( comment_id++ )
+											.setReview( String.format( "SQL:%d is %s!", sqlStandard, comments[j] ) )
+											.setPost( post )
+							);
+						}
+					}
+
+					session.persist(
+							new Post()
+									.setId( post_id++ )
+									.setTitle( "JPA 3.0" )
+					);
+					session.persist(
+							new Post()
+									.setId( post_id++ )
+									.setTitle( "JPA 2.2" )
+					);
+					session.persist(
+							new Post()
+									.setId( post_id++ )
+									.setTitle( "JPA 2.1" )
+					);
+					session.persist(
+							new Post()
+									.setId( post_id++ )
+									.setTitle( "JPA 2.0" )
+					);
+					session.persist(
+							new Post()
+									.setId( post_id )
+									.setTitle( "JPA 1.0" )
+					);
+				}
+		);
+	}
+
+
+	@Test
+	public void testNestedHqlSubQueries(SessionFactoryScope scope) {
+		String queryString =
+				" SELECT post_id AS post_id, post_title AS post_title, comment_id AS comment_id, comment_review AS comment_review "
+						+ " FROM ( "
+						+ " 	SELECT p.id AS post_id, p.title AS post_title, pc.id AS comment_id, pc.review AS comment_review "
+						+ " 		FROM PostComment pc JOIN pc.post p "
+						+ " 		WHERE p.title LIKE :title"
+						+ " 	) p_pc"
+						+ "	ORDER BY post_id, comment_id";
+
+		scope.inTransaction(
+				session -> {
+					List<Tuple> results = session.createQuery(
+									queryString,
+									Tuple.class
+							)
+							.setParameter( "title", "SQL%" )
+							.getResultList();
+				}
+		);
+	}
+
+	@Test
+	public void testNestedHqlSubQueries2(SessionFactoryScope scope) {
+		String queryString =
+				" SELECT post_id AS pid, post_title AS pt, comment_id AS cid, comment_review AS cr "
+						+ " FROM ( "
+						+ " 	SELECT post_id AS post_id, post_title AS post_title, comment_id AS comment_id,comment_review AS comment_review "
+						+ " 		FROM ( "
+						+ "				SELECT p.id AS post_id, p.title AS post_title, pc.id AS comment_id, pc.review AS comment_review "
+						+ "					FROM PostComment pc JOIN pc.post p WHERE p.title LIKE :title "
+						+ " 			) p_pc"
+						+ " ) p_pc_r "
+						+ " WHERE comment_review like :review ORDER BY post_id, comment_id ";
+
+		scope.inTransaction(
+				session -> {
+					List<Tuple> results = session.createQuery(
+									queryString,
+									Tuple.class
+							)
+							.setParameter( "title", "SQL%" )
+							.setParameter( "review", "/%" )
+							.getResultList();
+				}
+		);
+	}
+
+
+	@Entity(name = "Post")
+	@Table(name = "post")
+	public static class Post {
+
+		@Id
+		private Integer id;
+
+		private String title;
+
+		public Integer getId() {
+			return id;
+		}
+
+		public Post setId(Integer id) {
+			this.id = id;
+			return this;
+		}
+
+		public String getTitle() {
+			return title;
+		}
+
+		public Post setTitle(String title) {
+			this.title = title;
+			return this;
+		}
+	}
+
+	@Entity(name = "PostComment")
+	@Table(name = "post_comment")
+	public static class PostComment {
+
+		@Id
+		private Integer id;
+
+		@ManyToOne(fetch = FetchType.LAZY)
+		private Post post;
+
+		private String review;
+
+		public Integer getId() {
+			return id;
+		}
+
+		public PostComment setId(Integer id) {
+			this.id = id;
+			return this;
+		}
+
+		public Post getPost() {
+			return post;
+		}
+
+		public PostComment setPost(Post post) {
+			this.post = post;
+			return this;
+		}
+
+		public String getReview() {
+			return review;
+		}
+
+		public PostComment setReview(String review) {
+			this.review = review;
+			return this;
+		}
+	}
+}