From e6ec250cf5a1241dcca4bc387deb1bf9a25df485 Mon Sep 17 00:00:00 2001
From: Lars Vierbergen <vierbergenlars@gmail.com>
Date: Mon, 30 Oct 2017 20:52:28 +0100
Subject: [PATCH] Only delete duplicate ids when there are duplicates.

Running a query with an empty IN() is a syntax error
---
 .../VersionAuthserverExternalAccount20171020220239.php         | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Resources/migrations/VersionAuthserverExternalAccount20171020220239.php b/Resources/migrations/VersionAuthserverExternalAccount20171020220239.php
index 2d7afe9..4e2a245 100644
--- a/Resources/migrations/VersionAuthserverExternalAccount20171020220239.php
+++ b/Resources/migrations/VersionAuthserverExternalAccount20171020220239.php
@@ -32,7 +32,8 @@ class VersionAuthserverExternalAccount20171020220239 extends AbstractMigration
         $duplicateIds = array_map(function ($row) {
             return $row['id'];
         }, $duplicates);
-        $this->connection->executeUpdate('DELETE FROM vierbergenlars_external_account_external_user WHERE id IN(' . implode(',', $duplicateIds) . ')');
+        if (count($duplicateIds) > 0)
+            $this->connection->executeUpdate('DELETE FROM vierbergenlars_external_account_external_user WHERE id IN(' . implode(',', $duplicateIds) . ')');
     }
 
     public function down(Schema $schema)