fix: error in DBAL 2.x (#5)

Author: leeqvip

src/Adapter.php

@@ -17,7 +17,6 @@
 use Doctrine\DBAL\Connection;
 use Doctrine\DBAL\Exception;
 use Doctrine\DBAL\Query\Expression\CompositeExpression;
-use Doctrine\DBAL\Result;
 use Doctrine\DBAL\Schema\Schema;
 use Throwable;
 
@@ -487,12 +486,12 @@ public function getColumns(): array
     }
 
     /**
-     * @param mixed $stmt
+     * @param \Doctrine\DBAL\Result|\Doctrine\DBAL\Driver\PDOStatement $stmt
      *
      * @return mixed
      * @throws Exception
      */
-    private function fetch(Result $stmt)
+    private function fetch($stmt)
     {
         if (method_exists($stmt, 'fetchAssociative')) {
             return $stmt->fetchAssociative();

tests/AdapterTest.php

@@ -40,7 +40,9 @@ public function testUpdateFilteredPolicies()
             ["p", "bob", "data", "write", "allow"]
         ], $oldRules);
 
-        $result = $conn->createQueryBuilder()->from($adapter->policyTableName)->where('p_type = "p" and v1 = "data" and v3 = "allow"')->select("v0", "v1", "v2", "v3")->execute()->fetchAllAssociative();
+        $stmt = $conn->createQueryBuilder()->from($adapter->policyTableName)->where('p_type = "p" and v1 = "data" and v3 = "allow"')->select("v0", "v1", "v2", "v3")->execute();
+        $result = method_exists($stmt, 'fetchAssociative') ? $stmt->fetchAllAssociative() : $stmt->fetchAll();
+
         $result = array_map([$adapter, "filterRule"], $result);
 
         $this->assertEquals($newPolicies, $result);