From 347bb143e7fa154c243372f9d8e9f4d91d09386a Mon Sep 17 00:00:00 2001
From: Paul Holden <paulh@moodle.com>
Date: Wed, 23 Nov 2022 13:41:46 +0000
Subject: [PATCH] MDL-76446 user: correct logic for multiple keyword search.

When the keyword participant filter was used with multiple values
in conjunction with other participants filters, the boolean logic
was effectively:

 X AND Y OR Z

When what we actually wanted was:

 X AND (Y OR Z)
---
 user/classes/table/participants_search.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/user/classes/table/participants_search.php b/user/classes/table/participants_search.php
index 4d0b967b2eb..24b0f01a423 100644
--- a/user/classes/table/participants_search.php
+++ b/user/classes/table/participants_search.php
@@ -285,7 +285,7 @@ class participants_search {
             ] = $this->get_keywords_search_sql($mappings);
 
             if (!empty($keywordswhere)) {
-                $wheres[] = $keywordswhere;
+                $wheres[] = "({$keywordswhere})";
             }
 
             if (!empty($keywordsparams)) {