From 6192cd0bbe1394f6a3a2188a2e00aa8a4a6cc843 Mon Sep 17 00:00:00 2001
From: Ilja Neumann <ineumann@owncloud.com>
Date: Wed, 8 May 2024 10:49:31 +0200
Subject: [PATCH] fix: add equivalent index for mysql

---
 core/Migrations/Version20240507143125.php | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/core/Migrations/Version20240507143125.php b/core/Migrations/Version20240507143125.php
index 4b7c33bfb67..c5d61b64cc0 100644
--- a/core/Migrations/Version20240507143125.php
+++ b/core/Migrations/Version20240507143125.php
@@ -1,6 +1,7 @@
 <?php
 namespace OC\Migrations;
 
+use Doctrine\DBAL\Platforms\MySqlPlatform;
 use Doctrine\DBAL\Platforms\PostgreSqlPlatform;
 use Doctrine\DBAL\Platforms\SqlitePlatform;
 use OCP\IDBConnection;
@@ -14,6 +15,13 @@ public function sql(IDBConnection $connection) {
     		WHERE parent IS NOT NULL AND share_type = 2"];
 		}
 
+		if ($dbPlatform instanceof MySqlPlatform) {
+			// This should be preceise enough as mysql ignores nulls in unique indexes
+			return [
+				"CREATE UNIQUE INDEX child_share_unique ON oc_share (item_source, share_with, share_type, share_with, parent);"
+			];
+		}
+
 		return [];
 	}
 }