From a32b6249b07f1c480ea77e64be0def309b7f1d05 Mon Sep 17 00:00:00 2001
From: Matt Mundell <matt@mundell.me>
Date: Tue, 7 Nov 2023 17:03:03 +0200
Subject: [PATCH] Fix: Ensure iso_time uses user TZ when tz_override is empty

---
 src/manage_pg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/manage_pg.c b/src/manage_pg.c
index df9741fed..a31884f5c 100644
--- a/src/manage_pg.c
+++ b/src/manage_pg.c
@@ -569,7 +569,7 @@ manage_create_sql_functions ()
        "   user_zone text;"
        " BEGIN"
        "   user_zone :="
-       "     coalesce ((SELECT current_setting ('gvmd.tz_override')),"
+       "     coalesce (NULLIF((SELECT current_setting ('gvmd.tz_override')), ''),"
        "               (SELECT timezone FROM users"
        "                WHERE id = gvmd_user ()));"
        " RETURN iso_time (seconds, user_zone);"