actual freya branch

L2J_DataPack/dist/sql/maintenance/20080213maintenance.sql

@@ -0,0 +1,22 @@
+-- These queries will cleanup your tables from an already
+-- fixed bug where a player that deleted a friend
+-- stood in the ex-friend contacts list.
+-- 
+-- If your L2J server setup was born after Core release 1711
+-- you won't need to run this script. Else you might want to
+-- run it just once. (Running it again shouldn't have any
+-- effect.)
+
+CREATE TABLE tmp_friends(char_id INT, friend_id INT);
+
+INSERT INTO tmp_friends
+(char_id, friend_id)
+SELECT CF1.char_id, CF1.friend_id FROM character_friends AS CF1 WHERE CF1.char_id NOT IN 
+(SELECT CF2.friend_id FROM character_friends AS CF2 WHERE CF2.char_id = CF1.friend_id);
+
+DELETE FROM character_friends using character_friends 
+INNER JOIN tmp_friends AS TF
+ON character_friends.char_id = TF.char_id
+AND character_friends.friend_id = TF.friend_id;
+
+DROP TABLE tmp_friends;