From 3c0b6dc881b4a212eebcedca78aecb808282dcfe Mon Sep 17 00:00:00 2001
From: Robin <7276999+Kaffeetasse@users.noreply.github.com>
Date: Wed, 22 Nov 2023 01:31:34 +0100
Subject: [PATCH] Handle npgsql 8 command null value to fix #174

---
 src/DistributedLock.Postgres/PostgresAdvisoryLock.cs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/DistributedLock.Postgres/PostgresAdvisoryLock.cs b/src/DistributedLock.Postgres/PostgresAdvisoryLock.cs
index 3f6ad6e..9b6d105 100644
--- a/src/DistributedLock.Postgres/PostgresAdvisoryLock.cs
+++ b/src/DistributedLock.Postgres/PostgresAdvisoryLock.cs
@@ -103,6 +103,7 @@ private PostgresAdvisoryLock(bool isShared)
         return acquireCommandResult switch
         {
             DBNull _ => Cookie, // indicates we called pg_advisory_lock and not pg_try_advisory_lock
+            null => Cookie, // Npgsql 8 returns null instead of DBNull
             false => null,
             true => Cookie,
             _ => throw new InvalidOperationException($"Unexpected value '{acquireCommandResult}' from acquire command")