From b3cbd3875f10b739fe09427d2540e165b701871a Mon Sep 17 00:00:00 2001
From: Peter Gerwinski <peter.gerwinski@hs-bochum.de>
Date: Thu, 14 Dec 2023 09:37:47 +0100
Subject: [PATCH] =?UTF-8?q?Beispiele=207.12.2023:=20Korrektur=20der=20Einr?=
=?UTF-8?q?=C3=BCckung?=
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---
20231207/trigger-01.txt | 10 +++++++---
20231207/trigger-03.txt | 10 ++++++----
2 files changed, 13 insertions(+), 7 deletions(-)
diff --git a/20231207/trigger-01.txt b/20231207/trigger-01.txt
index b47a7d9..25f505a 100644
--- a/20231207/trigger-01.txt
+++ b/20231207/trigger-01.txt
@@ -51,9 +51,13 @@ testdb-> ;
FEHLER: Syntaxfehler bei »if«
ZEILE 2: if new.balance <> old.balance then
^
-testdb=> create function log_change () returns trigger language plpgsql as $$ begin if new.balance <> old.balance then insert into log_change (account_id, change, datetime) values (old.id, new.balance - old.balance, now ());
-end if;
-return new;
+testdb=> create function log_change () returns trigger language plpgsql as $$
+begin
+ if new.balance <> old.balance then
+ insert into log_change (account_id, change, datetime)
+ values (old.id, new.balance - old.balance, now ());
+ end if;
+ return new;
end;
$$
;
diff --git a/20231207/trigger-03.txt b/20231207/trigger-03.txt
index 0c307ff..6c266e6 100644
--- a/20231207/trigger-03.txt
+++ b/20231207/trigger-03.txt
@@ -10,10 +10,12 @@ FEHLER: kann Funktion log_change() nicht löschen, weil andere Objekte davon ab
DETAIL: Trigger after_update_account für Tabelle account hängt von Funktion log_change() ab
TIP: Verwenden Sie DROP ... CASCADE, um die abhängigen Objekte ebenfalls zu löschen.
testdb=> create or replace function log_change () returns trigger language plpgsql as $$
-begin if new.balance <> old.balance then
- insert into account_log (account_id, change, datetime) values (old.id, new.balance - old.balance, now ());
-end if;
-return new;
+begin
+ if new.balance <> old.balance then
+ insert into account_log (account_id, change, datetime)
+ values (old.id, new.balance - old.balance, now ());
+ end if;
+ return new;
end;
$$
;
--
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