HHH-19669 hql insert fails for entity with join inheritance on Oracle

Author: dreab8

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/cte/CteInsertHandler.java

@@ -702,7 +702,7 @@ protected String addDmlCtes(
 
 		final Generator identifierGenerator = entityDescriptor.getEntityPersister().getGenerator();
 		final List<Map.Entry<List<CteColumn>, Assignment>> tableAssignments = assignmentsByTable.get( rootTableReference );
-		if ( ( tableAssignments == null || tableAssignments.isEmpty() )
+		if ( !assignsId && ( tableAssignments == null || tableAssignments.isEmpty() )
 				&& !identifierGenerator.generatedOnExecution() ) {
 			throw new IllegalStateException( "There must be at least a single root table assignment" );
 		}

hibernate-core/src/main/java/org/hibernate/query/sqm/mutation/internal/temptable/InsertExecutionDelegate.java

@@ -217,7 +217,7 @@ public int execute(ExecutionContext executionContext) {
 			);
 
 			if ( rows != 0 ) {
-				final EntityPersister persister = entityDescriptor.getEntityPersister();
+				final EntityPersister 	persister = entityDescriptor.getEntityPersister();
 				final int tableSpan = persister.getTableSpan();
 				final int insertedRows = insertRootTable(
 						persister.getTableName( 0 ),
@@ -316,10 +316,11 @@ private int insertRootTable(
 		final EntityPersister entityPersister = entityDescriptor.getEntityPersister();
 		final Generator generator = entityPersister.getGenerator();
 		final List<Assignment> assignments = assignmentsByTable.get( tableExpression );
-		if ( ( assignments == null || assignments.isEmpty() )
-				&& !generator.generatedOnExecution()
-				&& ( !( generator instanceof BulkInsertionCapableIdentifierGenerator )
-					|| ( (BulkInsertionCapableIdentifierGenerator) generator ).supportsBulkInsertionIdentifierGeneration() ) ) {
+		if ( !assignsId
+			&& (assignments == null || assignments.isEmpty())
+			&& !generator.generatedOnExecution()
+			&& (!(generator instanceof BulkInsertionCapableIdentifierGenerator)
+				|| ((BulkInsertionCapableIdentifierGenerator) generator).supportsBulkInsertionIdentifierGeneration()) ) {
 			throw new IllegalStateException( "There must be at least a single root table assignment" );
 		}