From ad9908b3c1c8b338cbd2a39bedd2fad3e747180a Mon Sep 17 00:00:00 2001
From: Leon Stringer <leon.stringer@ntlworld.com>
Date: Mon, 10 Mar 2025 11:35:42 +0000
Subject: [PATCH] CTP-4472 mod_assign with debug output

---
 mod/assign/locallib.php | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/mod/assign/locallib.php b/mod/assign/locallib.php
index a912b10efc56f..a1c2123d538c3 100644
--- a/mod/assign/locallib.php
+++ b/mod/assign/locallib.php
@@ -2357,6 +2357,16 @@ public function list_participants($currentgroup, $idsonly, $tablesort = false) {
                            $additionalfilters
                   ORDER BY $orderby";
 
+            $records = $DB->get_records_sql("EXPLAIN $sql", $params);
+            foreach ($records as $record) {
+                echo "<!--\n" . print_r($record, true) . "\n-->\n";
+            }
+
+            $records = $DB->get_records_sql("EXPLAIN ANALYZE $sql", $params);
+            foreach ($records as $record) {
+                echo "<!--\n" . print_r($record, true) . "\n-->\n";
+            }
+
             $users = $DB->get_records_sql($sql, $params);
 
             $cm = $this->get_course_module();