1 files changed, 61 insertions, 0 deletions
diff --git a/lib/private/DB/ResultAdapter.php b/lib/private/DB/ResultAdapter.php
new file mode 100644
index 00000000000..95a7620e0ff
--- /dev/null
+++ b/lib/private/DB/ResultAdapter.php
@@ -0,0 +1,61 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2021 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-or-later
+ */
+namespace OC\DB;
+
+use Doctrine\DBAL\Result;
+use OCP\DB\IResult;
+use PDO;
+
+/**
+ * Adapts DBAL 2.6 API for DBAL 3.x for backwards compatibility of a leaked type
+ */
+class ResultAdapter implements IResult {
+	/** @var Result */
+	private $inner;
+
+	public function __construct(Result $inner) {
+		$this->inner = $inner;
+	}
+
+	public function closeCursor(): bool {
+		$this->inner->free();
+
+		return true;
+	}
+
+	public function fetch(int $fetchMode = PDO::FETCH_ASSOC) {
+		return match ($fetchMode) {
+			PDO::FETCH_ASSOC => $this->inner->fetchAssociative(),
+			PDO::FETCH_NUM => $this->inner->fetchNumeric(),
+			PDO::FETCH_COLUMN => $this->inner->fetchOne(),
+			default => throw new \Exception('Fetch mode needs to be assoc, num or column.'),
+		};
+	}
+
+	public function fetchAll(int $fetchMode = PDO::FETCH_ASSOC): array {
+		return match ($fetchMode) {
+			PDO::FETCH_ASSOC => $this->inner->fetchAllAssociative(),
+			PDO::FETCH_NUM => $this->inner->fetchAllNumeric(),
+			PDO::FETCH_COLUMN => $this->inner->fetchFirstColumn(),
+			default => throw new \Exception('Fetch mode needs to be assoc, num or column.'),
+		};
+	}
+
+	public function fetchColumn($columnIndex = 0) {
+		return $this->inner->fetchOne();
+	}
+
+	public function fetchOne() {
+		return $this->inner->fetchOne();
+	}
+
+	public function rowCount(): int {
+		return $this->inner->rowCount();
+	}
+}