From c8d9e59436e4dfb88be47ae1f6f88ea7dd616a89 Mon Sep 17 00:00:00 2001
From: Stephan <stephane@umbraco.dk>
Date: Wed, 30 Jan 2019 14:00:54 +0100
Subject: [PATCH] Fix SqlServer version detection

---
 .../Persistence/SqlSyntax/SqlServerSyntaxProvider.cs           | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/Umbraco.Core/Persistence/SqlSyntax/SqlServerSyntaxProvider.cs b/src/Umbraco.Core/Persistence/SqlSyntax/SqlServerSyntaxProvider.cs
index 8b8550b694..4e9417c760 100644
--- a/src/Umbraco.Core/Persistence/SqlSyntax/SqlServerSyntaxProvider.cs
+++ b/src/Umbraco.Core/Persistence/SqlSyntax/SqlServerSyntaxProvider.cs
@@ -134,7 +134,8 @@ namespace Umbraco.Core.Persistence.SqlSyntax
                     using (var reader = command.ExecuteReader())
                     {
                         reader.Read();
-                        version = new ServerVersionInfo(reader.GetString(0), reader.GetString(2), reader.GetString(3), (EngineEdition) reader.GetInt32(5), reader.GetString(7), reader.GetString(9));
+                        // InstanceName can be NULL for the default instance
+                        version = new ServerVersionInfo(reader.GetString(0), reader.GetString(2), reader.IsDBNull(3) ? "(default)" : reader.GetString(3), (EngineEdition) reader.GetInt32(5), reader.GetString(7), reader.GetString(9));
                     }
                     connection.Close();
                 }