From f8bd56e2196e0fe9cde68dbf3f753ea27c3c5f82 Mon Sep 17 00:00:00 2001 From: Machiavelli Date: Sun, 29 May 2011 00:32:18 +0200 Subject: DB/Schema: Correct use of indexes on mail_items table. Prevents deadlocks in operations on this table. --- sql/updates/characters/2011_05_29_0_characters_mail_items.sql | 7 +++++++ 1 file changed, 7 insertions(+) create mode 100644 sql/updates/characters/2011_05_29_0_characters_mail_items.sql (limited to 'sql/updates') diff --git a/sql/updates/characters/2011_05_29_0_characters_mail_items.sql b/sql/updates/characters/2011_05_29_0_characters_mail_items.sql new file mode 100644 index 00000000000..6d9feb2401d --- /dev/null +++ b/sql/updates/characters/2011_05_29_0_characters_mail_items.sql @@ -0,0 +1,7 @@ +-- Uncomment this query if the second query gives you primary key violation errors +-- DELETE FROM `mail_items` WHERE `item_guid` IN (SELECT `item_guid` FROM `mail_items` GROUP BY `item_guid` HAVING COUNT(`item_guid`) > 1); + +ALTER TABLE `mail_items` +DROP PRIMARY KEY, +ADD PRIMARY KEY(`item_guid`), +ADD KEY `idx_mail_id` (`mail_id`); -- cgit v1.2.3