feat: Support PDO::FETCH_KEY_PAIR

src/FakePdoStatementTrait.php

@@ -508,6 +508,30 @@ function ($row) use ($fetch_argument, $ctor_args) {
             );
         }
 
+        if ($fetch_style === \PDO::FETCH_KEY_PAIR) {
+            if (!$this->result) {
+                return [];
+            }
+
+            $output = [];
+
+            foreach ($this->result as $row) {
+                if ($this->conn->shouldStringifyResult()) {
+                    $row = self::stringify($row);
+                }
+
+                $values = \array_values($row);
+
+                if (\count($values) < 2) {
+                    throw new \PDOException('PDO::FETCH_KEY_PAIR requires at least two columns');
+                }
+
+                $output[$values[0]] = $values[1];
+            }
+
+            return $output;
+        }
+
         throw new \Exception('Fetch style not implemented');
     }
 

tests/EndToEndTest.php

@@ -95,6 +95,23 @@ public function testSelectFetchAssoc()
         );
     }
 
+    public function testSelectFetchKeyPair()
+    {
+        $pdo = self::getConnectionToFullDB();
+
+        $query = $pdo->prepare("SELECT id, name FROM `video_game_characters` WHERE `id` > :id ORDER BY `id` ASC");
+        $query->bindValue(':id', 14);
+        $query->execute();
+
+        $this->assertSame(
+            [
+                '15' => 'link',
+                '16' => 'dude'
+            ],
+            $query->fetchAll(\PDO::FETCH_KEY_PAIR)
+        );
+    }
+
     public function testSelectFetchAssocConverted()
     {
         $pdo = self::getConnectionToFullDB(false);