We can not assume the type of Query::getResult() if ResultType may be void

src/Type/Doctrine/Query/QueryResultDynamicReturnTypeExtension.php

@@ -93,12 +93,20 @@ private function getMethodReturnTypeForHydrationMode(
 		Type $queryResultType
 	): Type
 	{
-		if ($queryResultType instanceof VoidType) {
+		$isVoidType = (new VoidType())->isSuperTypeOf($queryResultType);
+
+		if ($isVoidType->yes()) {
 			// A void query result type indicates an UPDATE or DELETE query.
 			// In this case all methods return the number of affected rows.
 			return new IntegerType();
 		}
 
+		if ($isVoidType->maybe()) {
+			// We can't be sure what the query type is, so we return the
+			// declared return type of the method.
+			return $this->originalReturnType($methodReflection);
+		}
+
 		if (!$this->isObjectHydrationMode($hydrationMode)) {
 			// We support only HYDRATE_OBJECT. For other hydration modes, we
 			// return the declared return type of the method.

tests/Type/Doctrine/data/QueryResult/queryBuilderGetQuery.php

@@ -44,4 +44,26 @@ public function testQueryResultTypeIsMixedWhenDQLIsInvalid(EntityManagerInterfac
 		assertType('Doctrine\ORM\Query<mixed>', $query);
 	}
 
+	public function testQueryResultTypeIsVoidWithDeleteOrUpdate(EntityManagerInterface $em): void
+	{
+		$query = $em->getRepository(Many::class)
+				 ->createQueryBuilder('m')
+				 ->where('m.id IN (:ids)')
+				 ->setParameter('ids', $ids)
+				 ->delete()
+				 ->getQuery();
+
+		assertType('Doctrine\ORM\Query<void>', $query);
+
+		$query = $em->getRepository(Many::class)
+				 ->createQueryBuilder('m')
+				 ->where('m.id IN (:ids)')
+				 ->setParameter('ids', $ids)
+				 ->update()
+				 ->set('m.intColumn', '42')
+				 ->getQuery();
+
+		assertType('Doctrine\ORM\Query<void>', $query);
+
+	}
 }

tests/Type/Doctrine/data/QueryResult/queryResult.php

@@ -4,6 +4,7 @@
 
 use Doctrine\ORM\AbstractQuery;
 use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\Query;
 use function PHPStan\Testing\assertType;
 
 class QueryResultTest
@@ -210,4 +211,110 @@ public function testReturnTypeOfQueryMethodsWithExplicitNonConstantHydrationMode
 			$query->getOneOrNullResult($hydrationMode)
 		);
 	}
+
+	/**
+	 * Test that we return the original return type when ResultType may be
+	 * VoidType
+	 *
+	 * @param Query<mixed> $query
+	 */
+	public function testReturnTypeOfQueryMethodsWithReturnTypeIsMixed(EntityManagerInterface $em, Query $query): void
+	{
+		assertType(
+			'mixed',
+			$query->getResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->execute(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->executeIgnoreQueryCache(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->executeUsingQueryCache(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->getSingleResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->getOneOrNullResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+	}
+
+	/**
+	 * Test that we return the original return type when ResultType may be
+	 * VoidType (TemplateType variant)
+	 *
+	 * @template T
+	 *
+	 * @param Query<T> $query
+	 */
+	public function testReturnTypeOfQueryMethodsWithReturnTypeIsTemplateMixedType(EntityManagerInterface $em, Query $query): void
+	{
+		assertType(
+			'mixed',
+			$query->getResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->execute(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->executeIgnoreQueryCache(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->executeUsingQueryCache(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->getSingleResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'mixed',
+			$query->getOneOrNullResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+	}
+
+
+	/**
+	 * Test that we return ResultType return ResultType can not be VoidType
+	 *
+	 * @template T of array|object
+	 *
+	 * @param Query<T> $query
+	 */
+	public function testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(EntityManagerInterface $em, Query $query): void
+	{
+		assertType(
+			'array<T of array|object (method QueryResult\queryResult\QueryResultTest::testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(), argument)>',
+			$query->getResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'array<T of array|object (method QueryResult\queryResult\QueryResultTest::testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(), argument)>',
+			$query->execute(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'array<T of array|object (method QueryResult\queryResult\QueryResultTest::testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(), argument)>',
+			$query->executeIgnoreQueryCache(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'array<T of array|object (method QueryResult\queryResult\QueryResultTest::testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(), argument)>',
+			$query->executeUsingQueryCache(null, AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'T of array|object (method QueryResult\queryResult\QueryResultTest::testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(), argument)',
+			$query->getSingleResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+		assertType(
+			'(T of array|object (method QueryResult\queryResult\QueryResultTest::testReturnTypeOfQueryMethodsWithReturnTypeIsNonVoidTemplate(), argument))|null',
+			$query->getOneOrNullResult(AbstractQuery::HYDRATE_OBJECT)
+		);
+	}
 }