Using an integer as discriminator value with ORM v3

This fixes a bug that occurred when configuring integers as discriminator values and using DQL instanceOf function in the queries. Doctrine throws a type error whenever the application generates these queries.

src/Query/SqlWalker.php

@@ -2252,7 +2252,7 @@ private function getChildDiscriminatorsFromClassMetadata(
         }
 
         foreach (array_keys($discriminators) as $dis) {
-            $sqlParameterList[] = $this->conn->quote($dis);
+            $sqlParameterList[] = is_int($dis) ? $dis : $this->conn->quote((string) $dis);
         }
 
         return '(' . implode(', ', $sqlParameterList) . ')';

tests/Tests/ORM/Functional/Ticket/GH11341Test.php

@@ -49,6 +49,28 @@ public function testDiscriminatorValue(string $dql, string $expectedDiscriminato
 
         self::assertMatchesRegularExpression($expectedDiscriminatorValues, $sql);
     }
+
+    public static function dqlStatementsForInstanceOf(): Generator
+    {
+        yield [IntegerBaseClass::class, IntegerFooEntity::class];
+        yield [StringBaseClass::class, StringFooEntity::class];
+        yield [StringAsIntBaseClass::class, StringAsIntFooEntity::class];
+    }
+
+    #[DataProvider('dqlStatementsForInstanceOf')]
+    public function testInstanceOf(string $baseClass, string $inheritedClass): void
+    {
+        $this->_em->persist(new $inheritedClass());
+        $this->_em->flush();
+
+        $dql = "SELECT p FROM {$baseClass} p WHERE p INSTANCE OF {$baseClass}";
+
+        $query  = $this->_em->createQuery($dql);
+        $result = $query->getResult();
+
+        self::assertCount(1, $result);
+        self::assertContainsOnlyInstancesOf($baseClass, $result);
+    }
 }
 
 #[ORM\Entity]