From cb35a6dd90e810c747b4a863907b04a832242e72 Mon Sep 17 00:00:00 2001
From: Isaac Connor <isaac@zoneminder.com>
Date: Tue, 9 Jul 2024 08:12:52 -0400
Subject: [PATCH] Handle case when OLD.DiskSpace is NULL

---
 db/triggers.sql | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/db/triggers.sql b/db/triggers.sql
index 58f09bcbf..37e11bbc5 100644
--- a/db/triggers.sql
+++ b/db/triggers.sql
@@ -133,7 +133,7 @@ BEGIN
       UPDATE Storage SET DiskSpace = COALESCE(DiskSpace,0) + NEW.DiskSpace WHERE Storage.Id = NEW.StorageId;
     END IF;
     IF ( OLD.DiskSpace ) THEN
-      UPDATE Storage SET DiskSpace = GREATEST(COALESCE(DiskSpace,0) - OLD.DiskSpace,0) WHERE Storage.Id = OLD.StorageId;
+      UPDATE Storage SET DiskSpace = GREATEST(COALESCE(DiskSpace,0) - COALESCE(OLD.DiskSpace,0),0) WHERE Storage.Id = OLD.StorageId;
     END IF;
   END IF;
 
@@ -172,7 +172,6 @@ BEGIN
         TotalEventDiskSpace = GREATEST(COALESCE(TotalEventDiskSpace,0) - COALESCE(OLD.DiskSpace,0) + COALESCE(NEW.DiskSpace,0),0)
       WHERE Event_Summaries.MonitorId=OLD.MonitorId;
   END IF;
-
 END;
 
 //