From f597bb1def0dbb33b9670ba8be21b43eba50449c Mon Sep 17 00:00:00 2001
From: Matteo Scaramuccia <moodle@matteoscaramuccia.com>
Date: Thu, 3 Aug 2017 00:13:03 +0200
Subject: [PATCH] MDL-59583 dml: fixed NULL values w/ MariaDB 10.2.7+

---
 lib/dml/mysqli_native_moodle_database.php | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/lib/dml/mysqli_native_moodle_database.php b/lib/dml/mysqli_native_moodle_database.php
index 1f70e7b4c8e..9ec4ab7e0ec 100644
--- a/lib/dml/mysqli_native_moodle_database.php
+++ b/lib/dml/mysqli_native_moodle_database.php
@@ -804,10 +804,13 @@ class mysqli_native_moodle_database extends moodle_database {
         $info->meta_type      = $this->mysqltype2moodletype($rawcolumn->data_type);
         if ($this->has_breaking_change_quoted_defaults()) {
             $info->default_value = trim($rawcolumn->column_default, "'");
+            if ($info->default_value === 'NULL') {
+                $info->default_value = null;
+            }
         } else {
             $info->default_value = $rawcolumn->column_default;
         }
-        $info->has_default    = !is_null($rawcolumn->column_default);
+        $info->has_default    = !is_null($info->default_value);
         $info->not_null       = ($rawcolumn->is_nullable === 'NO');
         $info->primary_key    = ($rawcolumn->column_key === 'PRI');
         $info->binary         = false;