From 3b6fcd1f5bd6fb635c7b5709f7a13bf31692ad7c Mon Sep 17 00:00:00 2001
From: Paul Holden <paulh@moodle.com>
Date: Tue, 1 Aug 2023 12:46:18 +0100
Subject: [PATCH] MDL-78575 mod_lti: remove column alias from inner sub-select.

The `usage` alias is a reserved word in MySQL/MariaDB.
---
 .../local/systemreports/course_external_tools_list.php          | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mod/lti/classes/reportbuilder/local/systemreports/course_external_tools_list.php b/mod/lti/classes/reportbuilder/local/systemreports/course_external_tools_list.php
index 9d574cf9e57..7e8b46970c8 100644
--- a/mod/lti/classes/reportbuilder/local/systemreports/course_external_tools_list.php
+++ b/mod/lti/classes/reportbuilder/local/systemreports/course_external_tools_list.php
@@ -99,7 +99,7 @@ class course_external_tools_list extends system_report {
         // Tool usage column using a custom SQL subquery to count tool instances within the course.
         // TODO: This should be replaced with proper column aggregation once that's added to system_report instances in MDL-76392.
         $ti = database::generate_param_name(); // Tool instance param.
-        $sql = "(SELECT count($ti.id) as usage
+        $sql = "(SELECT COUNT($ti.id)
                 FROM {lti} $ti
                 WHERE $ti.typeid = {$entitymainalias}.id)";
         $this->add_column(new column(