From: APTX <marek321@gmail.com>
Date: Mon, 9 Nov 2015 15:09:57 +0000 (+0100)
Subject: Filter unnecessary update notifications.
X-Git-Url: https://gitweb.tyo.aptx.org/?a=commitdiff_plain;h=a6c34dd06712408784cd203a71d3ff9690e13549;p=localmylist.git

Filter unnecessary update notifications.

Only updates that actually change a column will trigger a notfication.
---

diff --git a/localmylist/share/schema/schema.sql b/localmylist/share/schema/schema.sql
index 7778218..873c2a5 100644
--- a/localmylist/share/schema/schema.sql
+++ b/localmylist/share/schema/schema.sql
@@ -373,19 +373,31 @@ CREATE OR REPLACE RULE watched_directory_insert_notify_rule AS
 
 -- Update rules
 CREATE OR REPLACE RULE anime_update_notify_rule AS
-	ON UPDATE TO anime DO SELECT pg_notify('rename_data_changed', ''),
+	ON UPDATE TO anime
+	WHERE old.aid = new.aid
+		AND (old.* IS DISTINCT FROM new.*)
+	DO SELECT pg_notify('rename_data_changed', ''),
 		pg_notify('anime_update', new.aid::text);
 
 CREATE OR REPLACE RULE episode_update_notify_rule AS
-	ON UPDATE TO episode DO SELECT pg_notify('rename_data_changed', ''),
+	ON UPDATE TO episode
+	WHERE old.eid = new.eid
+		AND (old.* IS DISTINCT FROM new.*)
+	DO SELECT pg_notify('rename_data_changed', ''),
 		pg_notify('episode_update', new.eid::text || ',' || new.aid::text);
 
 CREATE OR REPLACE RULE file_update_notify_rule AS
-	ON UPDATE TO file DO SELECT pg_notify('rename_data_changed', ''),
+	ON UPDATE TO file
+	WHERE old.fid = new.fid
+		AND (old.* IS DISTINCT FROM new.*)
+	DO SELECT pg_notify('rename_data_changed', ''),
 		pg_notify('file_update', new.fid::text || ',' || new.eid::text || ',' || new.aid::text);
 
 CREATE OR REPLACE RULE file_location_update_notify_rule AS
-	ON UPDATE TO file_location DO SELECT pg_notify('rename_data_changed', ''),
+	ON UPDATE TO file_location
+	WHERE old.location_id = new.location_id
+		AND (old.* IS DISTINCT FROM new.*)
+	DO SELECT pg_notify('rename_data_changed', ''),
 		pg_notify('file_location_update', new.location_id::text || ',' || new.fid::text);
 
 CREATE OR REPLACE RULE watched_directory_update_notify_rule AS