HHH-13201 - do not set empty text on collection join parent without queryable collection

hibernate-core/src/main/java/org/hibernate/hql/internal/ast/tree/FromElementFactory.java

@@ -368,7 +368,9 @@ public class FromElementFactory implements SqlTokenTypes {
 //		origin.addDestination( destination );
 // This was the cause of HHH-242
 //		origin.setType( FROM_FRAGMENT );			// Set the parent node type so that the AST is properly formed.
+		if ( origin.getQueryableCollection() != null ) {
 			origin.setText( "" );                        // The destination node will have all the FROM text.
+		}
 		origin.setCollectionJoin( true );            // The parent node is a collection join too (voodoo - see JoinProcessor)
 		fromClause.addCollectionJoinFromElementByPath( path, destination );
 		fromClause.getWalker().addQuerySpaces( queryableCollection.getCollectionSpaces() );

hibernate-core/src/main/java/org/hibernate/hql/internal/ast/tree/SelectClause.java

@@ -193,7 +193,7 @@ public class SelectClause extends SelectExpressionList {
 				FromElement fromElement = (FromElement) iterator.next();
 
 				if ( fromElement.isFetch() ) {
-					FromElement origin = null;
+					final FromElement origin;
 					if ( fromElement.getRealOrigin() == null ) {
 						// work around that crazy issue where the tree contains
 						// "empty" FromElements (no text); AFAICT, this is caused

hibernate-core/src/test/java/org/hibernate/test/hql/FetchNonRootRelativeElementCollectionAndAssociationTest.java

@@ -0,0 +1,70 @@
+package org.hibernate.test.hql;
+
+import org.hibernate.jpa.test.BaseEntityManagerFunctionalTestCase;
+
+import org.hibernate.testing.TestForIssue;
+import org.junit.Test;
+
+import javax.persistence.*;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import static javax.persistence.CascadeType.ALL;
+import static org.hibernate.testing.transaction.TransactionUtil.doInJPA;
+
+/**
+ * @author Moritz Becker
+ */
+@TestForIssue(jiraKey = "HHH-13201")
+public class FetchNonRootRelativeElementCollectionAndAssociationTest extends BaseEntityManagerFunctionalTestCase {
+
+	@Override
+	protected Class<?>[] getAnnotatedClasses() {
+		return new Class<?>[] { ProductNaturalId.class, Product.class, ProductDetail.class };
+	}
+
+	@Test
+	public void testJoinedSubclassUpdateWithCorrelation() {
+		doInJPA( this::entityManagerFactory, entityManager -> {
+			// DO NOT CHANGE this query: it used to trigger an error caused
+			// by the origin FromElement for the association fetch being resolved to the wrong FromElement due to the
+			// presence of an element collection join.
+			String u = "select prod from ProductNaturalId nat inner join nat.product prod " +
+					"left join fetch prod.productDetail " +
+					"left join fetch prod.normalizedPricesByUnit";
+			Query query = entityManager.createQuery( u, Product.class );
+			query.getResultList();
+		} );
+	}
+
+	@Entity(name = "ProductNaturalId")
+	public class ProductNaturalId {
+		@Id
+		private String naturalId;
+		@OneToOne(optional = false)
+		private Product product;
+	}
+
+	@Entity(name = "Product")
+	public class Product {
+		@Id
+		private Long id;
+		@OneToOne(mappedBy = "product", cascade = ALL, fetch = FetchType.LAZY)
+		private ProductDetail productDetail;
+		@OneToOne(mappedBy = "product", cascade = ALL, fetch = FetchType.LAZY)
+		private ProductNaturalId naturalId;
+		@ElementCollection(fetch = FetchType.LAZY)
+		private Map<String, String> normalizedPricesByUnit = new HashMap<>();
+	}
+
+	@Entity(name = "ProductDetail")
+	public class ProductDetail {
+		@Id
+		private Long id;
+		@OneToOne(optional = false)
+		@JoinColumn(name = "id")
+		@MapsId
+		private Product product;
+	}
+}