From 88e7c13d9a6d7bfca86dfda98f49d130b3708689 Mon Sep 17 00:00:00 2001
From: Jake Dallimore <jake@moodle.com>
Date: Mon, 15 Aug 2016 14:19:35 +0800
Subject: [PATCH] MDL-55565 core_backup: Fix warning when restoring question
 categories

Fixed a call to get_records_sql, which was being used incorrectly in
restore_find_best_target_context to determine a unique contextid.
---
 backup/util/dbops/restore_dbops.class.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/backup/util/dbops/restore_dbops.class.php b/backup/util/dbops/restore_dbops.class.php
index 430e8bb0e46..8e37dd8300d 100644
--- a/backup/util/dbops/restore_dbops.class.php
+++ b/backup/util/dbops/restore_dbops.class.php
@@ -793,7 +793,7 @@ abstract class restore_dbops {
                      // Prepare the query
                      list($stamp_sql, $stamp_params) = $DB->get_in_or_equal($stamps);
                      list($context_sql, $context_params) = $DB->get_in_or_equal($contexts);
-                     $sql = "SELECT contextid
+                     $sql = "SELECT DISTINCT contextid
                                FROM {question_categories}
                               WHERE stamp $stamp_sql
                                 AND contextid $context_sql";