From 0e8a19b2fa2d8c673f0a2e4a8ca0f9176f4a89cc Mon Sep 17 00:00:00 2001
From: bash <31279994+hermensbas@users.noreply.github.com>
Date: Thu, 1 May 2025 01:14:51 +0200
Subject: [PATCH] check if already exist before apply (#1254)

---
 .../updates/db_playerbots/2025_04_26_00.sql   | 34 ++++++++++++++-----
 1 file changed, 25 insertions(+), 9 deletions(-)

diff --git a/data/sql/playerbots/updates/db_playerbots/2025_04_26_00.sql b/data/sql/playerbots/updates/db_playerbots/2025_04_26_00.sql
index b2a9500e..3a5fdb4c 100644
--- a/data/sql/playerbots/updates/db_playerbots/2025_04_26_00.sql
+++ b/data/sql/playerbots/updates/db_playerbots/2025_04_26_00.sql
@@ -1,9 +1,25 @@
--- ##########################################################
--- # Playerbots RandomBots Performance Update
--- # Add missing index to reduce Deadlocks
--- # Author: Raz0r1337 aka St0ny
--- # Date: 2025-04-26
--- ##########################################################
-
-ALTER TABLE `playerbots_random_bots`
-ADD INDEX `idx_owner_bot_event` (`owner`, `bot`, `event`);
+-- ##########################################################
+-- # Playerbots RandomBots Performance Update
+-- # Add missing index to reduce Deadlocks
+-- # Author: Raz0r1337 aka St0ny
+-- # Date: 2025-04-26
+-- ##########################################################
+
+-- Check if the index already exists
+SET @index_exists := (
+  SELECT COUNT(1)
+  FROM INFORMATION_SCHEMA.STATISTICS
+  WHERE TABLE_SCHEMA = DATABASE()
+    AND TABLE_NAME = 'playerbots_random_bots'
+    AND INDEX_NAME = 'idx_owner_bot_event'
+);
+
+-- Conditionally create the index only if it doesn't exist
+SET @ddl := IF(@index_exists = 0,
+  'ALTER TABLE `playerbots_random_bots` ADD INDEX `idx_owner_bot_event` (`owner`, `bot`, `event`);',
+  'SELECT "Index idx_owner_bot_event already exists.";'
+);
+
+PREPARE stmt FROM @ddl;
+EXECUTE stmt;
+DEALLOCATE PREPARE stmt;