diff --git a/hibernate-core/src/main/java/org/hibernate/procedure/internal/FunctionReturnImpl.java b/hibernate-core/src/main/java/org/hibernate/procedure/internal/FunctionReturnImpl.java
index a394425407..8f9030473f 100644
--- a/hibernate-core/src/main/java/org/hibernate/procedure/internal/FunctionReturnImpl.java
+++ b/hibernate-core/src/main/java/org/hibernate/procedure/internal/FunctionReturnImpl.java
@@ -7,6 +7,8 @@
 
 package org.hibernate.procedure.internal;
 
+import java.sql.CallableStatement;
+import java.sql.SQLException;
 import java.sql.Types;
 import jakarta.persistence.ParameterMode;
 
@@ -130,4 +132,10 @@ public class FunctionReturnImpl implements FunctionReturnImplementor {
 			}
 		};
 	}
+
+	@Override
+	public void prepare(CallableStatement statement, int startIndex, ProcedureCallImplementor callImplementor)
+			throws SQLException {
+		throw new NotYetImplementedFor6Exception( getClass() );
+	}
 }
diff --git a/hibernate-core/src/main/java/org/hibernate/procedure/spi/ProcedureParameterImplementor.java b/hibernate-core/src/main/java/org/hibernate/procedure/spi/ProcedureParameterImplementor.java
index 7f8b900db0..0087bd6ad6 100644
--- a/hibernate-core/src/main/java/org/hibernate/procedure/spi/ProcedureParameterImplementor.java
+++ b/hibernate-core/src/main/java/org/hibernate/procedure/spi/ProcedureParameterImplementor.java
@@ -10,7 +10,6 @@ import java.sql.CallableStatement;
 import java.sql.SQLException;
 
 import org.hibernate.Incubating;
-import org.hibernate.NotYetImplementedFor6Exception;
 import org.hibernate.query.procedure.ProcedureParameter;
 import org.hibernate.query.spi.QueryParameterImplementor;
 
@@ -27,10 +26,8 @@ public interface ProcedureParameterImplementor<T> extends ProcedureParameter<T>,
 	 *
 	 * @throws SQLException Indicates a problem with any underlying JDBC calls
 	 */
-	default void prepare(
+	void prepare(
 			CallableStatement statement,
 			int startIndex,
-			ProcedureCallImplementor<?> callImplementor) throws SQLException{
-		throw new NotYetImplementedFor6Exception( getClass() );
-	}
+			ProcedureCallImplementor<?> callImplementor) throws SQLException;
 }
diff --git a/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmTreePrinter.java b/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmTreePrinter.java
index 6ea630336c..41e7d593d1 100644
--- a/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmTreePrinter.java
+++ b/hibernate-core/src/main/java/org/hibernate/query/sqm/internal/SqmTreePrinter.java
@@ -90,12 +90,14 @@ import org.hibernate.query.sqm.tree.predicate.SqmOrPredicate;
 import org.hibernate.query.sqm.tree.predicate.SqmPredicate;
 import org.hibernate.query.sqm.tree.predicate.SqmWhereClause;
 import org.hibernate.query.sqm.tree.select.SqmDynamicInstantiation;
+import org.hibernate.query.sqm.tree.select.SqmJpaCompoundSelection;
 import org.hibernate.query.sqm.tree.select.SqmOrderByClause;
 import org.hibernate.query.sqm.tree.select.SqmQueryGroup;
 import org.hibernate.query.sqm.tree.select.SqmQueryPart;
 import org.hibernate.query.sqm.tree.select.SqmQuerySpec;
 import org.hibernate.query.sqm.tree.select.SqmSelectClause;
 import org.hibernate.query.sqm.tree.select.SqmSelectStatement;
+import org.hibernate.query.sqm.tree.select.SqmSelectableNode;
 import org.hibernate.query.sqm.tree.select.SqmSelection;
 import org.hibernate.query.sqm.tree.select.SqmSortSpecification;
 import org.hibernate.query.sqm.tree.select.SqmSubQuery;
@@ -463,6 +465,20 @@ public class SqmTreePrinter implements SemanticQueryWalker<Object> {
 		return null;
 	}
 
+	@Override
+	public Object visitJpaCompoundSelection(SqmJpaCompoundSelection<?> selection) {
+		processStanza(
+				"JpaCompoundSelection",
+				() -> {
+					for ( SqmSelectableNode<?> selectionItem : selection.getSelectionItems() ) {
+						selectionItem.accept( this );
+					}
+				}
+		);
+
+		return null;
+	}
+
 	@Override
 	public Object visitFromClause(SqmFromClause fromClause) {
 		processStanza(