From d93ce73de7c5dd6f761e802e4439e555332a855a Mon Sep 17 00:00:00 2001
From: "Alvar C.H. Freude" <alvar@Chefkoch-2023.fritz.box>
Date: Mon, 1 Apr 2024 20:16:03 +0200
Subject: [PATCH] add update_changed trigger

---
 helper/81-changed-trigger.sql | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)
 create mode 100644 helper/81-changed-trigger.sql

diff --git a/helper/81-changed-trigger.sql b/helper/81-changed-trigger.sql
new file mode 100644
index 0000000..503e32a
--- /dev/null
+++ b/helper/81-changed-trigger.sql
@@ -0,0 +1,22 @@
+-- 
+-- update_changed trigger
+--  kann überall als Trigger-Funktion genutzt werden, um bei Aktualisierungen das aktuelle Datum reinzuschreiben.
+-- 
+
+CREATE OR REPLACE FUNCTION update_changed() RETURNS trigger
+    AS $code$
+      BEGIN
+        NEW.changed := now();
+        RETURN NEW;
+      END;
+      $code$
+   LANGUAGE plpgsql
+   SECURITY DEFINER
+   SET search_path = :schema, pg_temp
+   ;
+
+-- 
+\set function update_changed()
+\ir 55-function-grant-all.sql
+
+