From afd3bee28ee1380f224065dc4fae2c619bcafe16 Mon Sep 17 00:00:00 2001
From: Andrea Boriero <andrea@hibernate.org>
Date: Wed, 28 Jun 2023 15:06:29 +0200
Subject: [PATCH] HHH-15720 Using multiple select in a multiselect generates
 java.lang.ArrayIndexOutOfBoundsException

---
 .../query/sqm/sql/BaseSqmToSqlAstConverter.java        | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java b/hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java
index da44cceddd..ad8eb2ac32 100644
--- a/hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java
+++ b/hibernate-core/src/main/java/org/hibernate/query/sqm/sql/BaseSqmToSqlAstConverter.java
@@ -8241,7 +8241,15 @@ public abstract class BaseSqmToSqlAstConverter<T extends Statement> extends Base
 					offset = countIndividualSelections( ( (SqmDynamicInstantiation<?>) selectableNode ).getArguments() ) - 1;
 				}
 				else if ( selectableNode instanceof SqmJpaCompoundSelection<?> ) {
-					offset += ( (SqmJpaCompoundSelection<?>) selectableNode ).getSelectionItems().size() - 1;
+					for ( SqmSelectableNode<?> node : ( (SqmJpaCompoundSelection<?>) selectableNode ).getSelectionItems() ) {
+						if ( node instanceof SqmDynamicInstantiation<?> ) {
+							offset += countIndividualSelections( ( (SqmDynamicInstantiation<?>) node ).getArguments() ) ;
+						}
+						else {
+							offset += 1;
+						}
+					}
+					offset -= 1;
 				}
 			}
 			return offset + selections.size();