Fix SQL alias generation regression for simple inheritance (#8329)

This fixes a regression from 099c5b4.
Without the fix, "where part" in SQL is generated with incorrect aliases.
See #8229 (comment).

lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php

@@ -1698,7 +1698,7 @@ private function getSelectConditionStatementColumnSQL($field, $assoc = null)
         if (isset($this->class->fieldMappings[$field])) {
             // Fix for bug GH-8229 (id column from parent class renamed in child class):
             // Use the correct metadata and name for the id column
-            if (isset($this->class->fieldMappings[$field]['inherited'])) {
+            if (isset($this->class->fieldMappings[$field]['inherited']) && $this->class->inheritanceType !== ClassMetadata::INHERITANCE_TYPE_NONE) {
                 $className = $this->class->fieldMappings[$field]['inherited'];
                 $class     = $this->em->getClassMetadata($className);
             } else {

tests/Doctrine/Tests/ORM/Functional/Ticket/GH8229Test.php

@@ -23,6 +23,8 @@ protected function setUp() : void
             [
                 GH8229Resource::class,
                 GH8229User::class,
+                GH8229EntityWithoutDiscriminator::class,
+                EntityExtendingGH8229EntityWithoutDiscriminator::class,
             ]
         );
     }
@@ -183,6 +185,19 @@ public function testCorrectColumnNamesInPessimisticWriteLock()
 
         self::assertEquals($identifier, $entity->id);
     }
+
+    /** this test check alias generation not altered by inheritance in ResolvedTargetEntities mapped classes
+     */
+    public function testBasicEntityPersisterAliasGenerationWithSimpleInheritance()
+    {
+        $this->expectNotToPerformAssertions();
+
+        $entity = new EntityExtendingGH8229EntityWithoutDiscriminator();
+        $this->_em->persist($entity);
+        $this->_em->flush();
+
+        $this->_em->getRepository(EntityExtendingGH8229EntityWithoutDiscriminator::class)->findOneBy(['id' => $entity->getId()]);
+    }
 }
 
 
@@ -244,3 +259,29 @@ public function __construct($username)
         $this->username = $username;
     }
 }
+
+/**
+ * @Entity
+ * @Table(name="gh8229_replacedentity")
+ */
+class GH8229EntityWithoutDiscriminator
+{
+    /**
+     * @Id
+     * @GeneratedValue
+     * @Column(type="integer")
+     */
+    public $id;
+
+    public function getId()
+    {
+        return $this->id;
+    }
+}
+
+/**
+ * @Entity
+ */
+final class EntityExtendingGH8229EntityWithoutDiscriminator extends GH8229EntityWithoutDiscriminator
+{
+}