diff --git a/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php b/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php
index 9cec30ffd..972199c5e 100644
--- a/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php
+++ b/lib/Doctrine/ORM/Persisters/Entity/BasicEntityPersister.php
@@ -344,16 +344,28 @@ class BasicEntityPersister implements EntityPersister
              . ' FROM '  . $tableName
              . ' WHERE ' . implode(' = ? AND ', $identifier) . ' = ?';
 
+
+        $flatId = $this->identifierFlattener->flattenIdentifier($versionedClass, $id);
+
+        $value = $this->conn->fetchColumn(
+            $sql,
+            array_values($flatId),
+            0,
+            $this->extractIdentifierTypes($id, $versionedClass)
+        );
+
+        return Type::getType($fieldMapping['type'])->convertToPHPValue($value, $this->platform);
+    }
+
+    private function extractIdentifierTypes(array $id, ClassMetadata $versionedClass) : array
+    {
         $types = [];
+
         foreach ($id as $field => $value) {
             $types = array_merge($types, $this->getTypes($field, $value, $versionedClass));
         }
 
-        $flatId = $this->identifierFlattener->flattenIdentifier($versionedClass, $id);
-
-        $value = $this->conn->fetchColumn($sql, array_values($flatId), 0, $types);
-
-        return Type::getType($fieldMapping['type'])->convertToPHPValue($value, $this->platform);
+        return $types;
     }
 
     /**